diff --git a/app/main.py b/app/main.py
index 0157039..ad1986e 100644
--- a/app/main.py
+++ b/app/main.py
@@ -28,3 +28,8 @@ def index(request: Request):
 @app.get("/debug.html", response_class=HTMLResponse)
 def debug_page(request: Request):
     return templates.TemplateResponse("debug.html", {"request": request})
+
+
+@app.get("/tvdb-embed-test.html", response_class=HTMLResponse)
+def tvdb_embed_test_page(request: Request):
+    return templates.TemplateResponse("tvdb_embed_test.html", {"request": request})
diff --git a/app/static/app.js b/app/static/app.js
index 0552c4d..6a49fca 100644
--- a/app/static/app.js
+++ b/app/static/app.js
@@ -25,6 +25,8 @@
     },
     rememberedSeries: [],
     liveSearchItems: [],
+    tvdbModalUrl: "",
+    tvdbModalTimer: null,
   };
 
   const el = {
@@ -46,6 +48,12 @@
     seriesStatus: document.getElementById("seriesStatus"),
     seriesOverview: document.getElementById("seriesOverview"),
     seriesTvdbLink: document.getElementById("seriesTvdbLink"),
+    tvdbModal: document.getElementById("tvdbModal"),
+    closeTvdbModalBtn: document.getElementById("closeTvdbModalBtn"),
+    tvdbModalOpenInTabBtn: document.getElementById("tvdbModalOpenInTabBtn"),
+    tvdbModalFrame: document.getElementById("tvdbModalFrame"),
+    tvdbModalStatus: document.getElementById("tvdbModalStatus"),
+    tvdbModalFallback: document.getElementById("tvdbModalFallback"),
     settingsBtn: document.getElementById("settingsBtn"),
     settingsModal: document.getElementById("settingsModal"),
     closeSettingsModalBtn: document.getElementById("closeSettingsModalBtn"),
@@ -199,6 +207,57 @@
     return "";
   }
 
+  function validTvdbUrl(value) {
+    try {
+      const url = new URL((value || "").toString().trim());
+      if (url.protocol !== "https:") return false;
+      return url.hostname === "www.thetvdb.com" || url.hostname === "thetvdb.com";
+    } catch (_err) {
+      return false;
+    }
+  }
+
+  function clearTvdbModalTimer() {
+    if (state.tvdbModalTimer) {
+      window.clearTimeout(state.tvdbModalTimer);
+      state.tvdbModalTimer = null;
+    }
+  }
+
+  function showTvdbModalFallback(message) {
+    el.tvdbModalStatus.textContent = message;
+    el.tvdbModalFallback.classList.remove("hidden");
+  }
+
+  function openTvdbModal() {
+    if (!validTvdbUrl(state.tvdbModalUrl)) return;
+
+    el.tvdbModal.classList.remove("hidden");
+    el.tvdbModal.setAttribute("aria-hidden", "false");
+    el.tvdbModalFallback.classList.add("hidden");
+    el.tvdbModalStatus.textContent = "Loading TVDB preview...";
+
+    clearTvdbModalTimer();
+    state.tvdbModalTimer = window.setTimeout(() => {
+      showTvdbModalFallback("No embed load confirmation received. Embedding is likely blocked.");
+    }, 5000);
+    el.tvdbModalFrame.src = state.tvdbModalUrl;
+  }
+
+  function closeTvdbModal() {
+    clearTvdbModalTimer();
+    el.tvdbModal.classList.add("hidden");
+    el.tvdbModal.setAttribute("aria-hidden", "true");
+    el.tvdbModalFrame.removeAttribute("src");
+    el.tvdbModalStatus.textContent = "";
+    el.tvdbModalFallback.classList.add("hidden");
+  }
+
+  function openTvdbInTab() {
+    if (!validTvdbUrl(state.tvdbModalUrl)) return;
+    window.open(state.tvdbModalUrl, "_blank", "noopener,noreferrer");
+  }
+
   function renderSelectedSeriesDetails() {
     const item = state.selectedSeries;
     if (!item) {
@@ -225,9 +284,11 @@
     el.seriesOverview.textContent = overview || "No overview available.";
 
     if (tvdbUrl) {
+      state.tvdbModalUrl = tvdbUrl;
       el.seriesTvdbLink.href = tvdbUrl;
       el.seriesTvdbLink.classList.remove("hidden");
     } else {
+      state.tvdbModalUrl = "";
       el.seriesTvdbLink.removeAttribute("href");
       el.seriesTvdbLink.classList.add("hidden");
     }
@@ -878,6 +939,21 @@
       e.stopPropagation();
     });
     document.addEventListener("click", closeRememberedDropdown);
+    el.seriesTvdbLink.addEventListener("click", (e) => {
+      e.preventDefault();
+      openTvdbModal();
+    });
+    el.closeTvdbModalBtn.addEventListener("click", closeTvdbModal);
+    el.tvdbModalOpenInTabBtn.addEventListener("click", openTvdbInTab);
+    el.tvdbModal.addEventListener("click", (e) => {
+      if (e.target === el.tvdbModal) closeTvdbModal();
+    });
+    el.tvdbModalFrame.addEventListener("load", () => {
+      clearTvdbModalTimer();
+      el.tvdbModalStatus.textContent =
+        "Iframe load event received. If the page is visible, embedding works in this browser.";
+      el.tvdbModalFallback.classList.add("hidden");
+    });
     el.settingsBtn.addEventListener("click", openSettingsModal);
     el.closeSettingsModalBtn.addEventListener("click", closeSettingsModal);
     el.saveSettingsBtn.addEventListener("click", () => withHandler(saveSettings, el.saveSettingsBtn));
diff --git a/app/static/styles.css b/app/static/styles.css
index 011f04d..84bf239 100644
--- a/app/static/styles.css
+++ b/app/static/styles.css
@@ -412,6 +412,41 @@ button.secondary {
   min-height: 0;
 }
 
+.tvdb-modal-card {
+  width: min(1500px, 92vw);
+  height: 86vh;
+}
+
+.tvdb-modal-head {
+  margin-bottom: 6px;
+}
+
+.tvdb-fallback {
+  border: 1px solid var(--border);
+  border-radius: 6px;
+  padding: 10px;
+  margin-bottom: 8px;
+  background: var(--surface-subtle);
+}
+
+.tvdb-fallback h4 {
+  margin: 0 0 6px;
+}
+
+.tvdb-fallback p {
+  margin: 0;
+  color: var(--text-muted);
+}
+
+.tvdb-modal-frame {
+  width: 100%;
+  flex: 1;
+  min-height: 0;
+  border: 1px solid var(--border);
+  border-radius: 6px;
+  background: var(--surface-subtle);
+}
+
 .modal-head {
   display: flex;
   align-items: center;
diff --git a/app/templates/index.html b/app/templates/index.html
index 2af9544..38f8372 100644
--- a/app/templates/index.html
+++ b/app/templates/index.html
@@ -192,6 +192,26 @@
       </div>
     </div>
 
+    <div id="tvdbModal" class="modal hidden" aria-hidden="true">
+      <div class="modal-card tvdb-modal-card">
+        <div class="row modal-head tvdb-modal-head">
+          <h3>TVDB Preview</h3>
+          <div class="panel-head-actions">
+            <button id="tvdbModalOpenInTabBtn" class="secondary">Open in tab</button>
+            <button id="closeTvdbModalBtn" class="secondary" aria-label="Close TVDB preview">✕</button>
+          </div>
+        </div>
+        <p id="tvdbModalStatus" class="muted"></p>
+        <div id="tvdbModalFallback" class="tvdb-fallback hidden">
+          <h4>Embedding blocked or unavailable</h4>
+          <p>
+            This page cannot be embedded here. TheTVDB may block framing using browser security headers.
+          </p>
+        </div>
+        <iframe id="tvdbModalFrame" title="TVDB Preview" class="tvdb-modal-frame"></iframe>
+      </div>
+    </div>
+
     <script src="/static/app.js"></script>
   </body>
 </html>
diff --git a/app/templates/tvdb_embed_test.html b/app/templates/tvdb_embed_test.html
new file mode 100644
index 0000000..e364982
--- /dev/null
+++ b/app/templates/tvdb_embed_test.html
@@ -0,0 +1,120 @@
+<!doctype html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8" />
+    <meta name="viewport" content="width=device-width, initial-scale=1" />
+    <title>Rename MVP - TVDB Embed Test</title>
+    <script>
+      (function () {
+        var key = "rename_mvp_theme";
+        var theme = localStorage.getItem(key);
+        if (theme !== "light" && theme !== "dark") {
+          theme = "dark";
+        }
+        document.documentElement.setAttribute("data-theme", theme);
+      })();
+    </script>
+    <link rel="stylesheet" href="/static/styles.css" />
+  </head>
+  <body>
+    <header class="topbar">
+      <h1>TVDB Embed Test</h1>
+      <div id="testMeta">Standalone iframe validation page</div>
+    </header>
+    <main class="debug-page">
+      <section class="panel" style="height: calc(100vh - 100px); min-height: 0;">
+        <div class="panel-head">
+          <h2>Embed Validation</h2>
+        </div>
+        <div class="panel-body" style="min-height: 0;">
+          <div class="row">
+            <label for="tvdbUrlInput">TVDB URL</label>
+            <input
+              id="tvdbUrlInput"
+              type="text"
+              value="https://www.thetvdb.com/series/ghosts-us"
+              style="flex: 1; min-width: 260px;"
+            />
+            <button id="loadEmbedBtn">Load in iframe</button>
+            <button id="openInTabBtn" class="secondary">Open in tab</button>
+          </div>
+          <p id="embedStatus" class="muted"></p>
+          <div id="embedFallback" class="panel hidden" style="margin-bottom: 8px;">
+            <h3>Embedding blocked or failed</h3>
+            <p class="muted" style="margin: 0;">
+              The page could not be embedded. This is usually caused by TheTVDB frame restrictions
+              (`X-Frame-Options` or `Content-Security-Policy: frame-ancestors`).
+            </p>
+          </div>
+          <iframe
+            id="tvdbFrame"
+            title="TVDB Embed Test Frame"
+            style="width: 100%; height: 100%; border: 1px solid var(--border); border-radius: 6px; background: var(--surface-subtle);"
+          ></iframe>
+        </div>
+      </section>
+    </main>
+
+    <script>
+      (function () {
+        var input = document.getElementById("tvdbUrlInput");
+        var frame = document.getElementById("tvdbFrame");
+        var status = document.getElementById("embedStatus");
+        var fallback = document.getElementById("embedFallback");
+        var loadBtn = document.getElementById("loadEmbedBtn");
+        var openBtn = document.getElementById("openInTabBtn");
+        var fallbackTimer = null;
+
+        function validTvdbUrl(value) {
+          try {
+            var u = new URL(value);
+            return u.protocol === "https:" && (u.hostname === "www.thetvdb.com" || u.hostname === "thetvdb.com");
+          } catch (_err) {
+            return false;
+          }
+        }
+
+        function showFallback(text) {
+          status.textContent = text;
+          fallback.classList.remove("hidden");
+        }
+
+        function loadFrame() {
+          var url = (input.value || "").trim();
+          if (!validTvdbUrl(url)) {
+            showFallback("Enter a valid https://www.thetvdb.com URL.");
+            frame.removeAttribute("src");
+            return;
+          }
+
+          fallback.classList.add("hidden");
+          status.textContent = "Loading iframe...";
+          if (fallbackTimer) window.clearTimeout(fallbackTimer);
+          fallbackTimer = window.setTimeout(function () {
+            showFallback("No iframe load confirmation received. Embedding is likely blocked.");
+          }, 5000);
+          frame.src = url;
+        }
+
+        frame.addEventListener("load", function () {
+          if (fallbackTimer) window.clearTimeout(fallbackTimer);
+          status.textContent =
+            "Iframe load event received. If TVDB content is visible below, embedding works in this browser.";
+          fallback.classList.add("hidden");
+        });
+
+        loadBtn.addEventListener("click", loadFrame);
+        openBtn.addEventListener("click", function () {
+          var url = (input.value || "").trim();
+          if (!validTvdbUrl(url)) {
+            showFallback("Enter a valid https://www.thetvdb.com URL.");
+            return;
+          }
+          window.open(url, "_blank", "noopener,noreferrer");
+        });
+
+        loadFrame();
+      })();
+    </script>
+  </body>
+</html>
diff --git a/data/session_state.sqlite3 b/data/session_state.sqlite3
index eef230f..51317f7 100644
Binary files a/data/session_state.sqlite3 and b/data/session_state.sqlite3 differ
diff --git a/feature_tests_tvdb_embed.sh b/feature_tests_tvdb_embed.sh
new file mode 100755
index 0000000..5dda956
--- /dev/null
+++ b/feature_tests_tvdb_embed.sh
@@ -0,0 +1,56 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+BASE_URL="${BASE_URL:-http://127.0.0.1:8085}"
+ALT_BASE_URL="http://host.containers.internal:8085"
+
+detect_base_url() {
+  if curl -fsS --max-time 2 "$BASE_URL/api/health" >/dev/null 2>&1; then
+    echo "$BASE_URL"
+    return
+  fi
+  if curl -fsS --max-time 2 "$ALT_BASE_URL/api/health" >/dev/null 2>&1; then
+    echo "$ALT_BASE_URL"
+    return
+  fi
+  echo "$BASE_URL"
+}
+
+BASE_URL="$(detect_base_url)"
+
+echo "Using BASE_URL=$BASE_URL"
+
+echo "== Feature test 1: tvdb embed test route is served =="
+page="$(curl -fsS "$BASE_URL/tvdb-embed-test.html")"
+echo "$page" | grep -q "TVDB Embed Test" || {
+  echo "Expected TVDB Embed Test title missing"
+  exit 1
+}
+echo "route availability validation passed"
+
+echo
+echo "== Feature test 2: iframe and fallback UI exist =="
+echo "$page" | grep -q 'id="tvdbFrame"' || {
+  echo "Expected iframe with id tvdbFrame missing"
+  exit 1
+}
+echo "$page" | grep -q 'id="embedFallback"' || {
+  echo "Expected embed fallback container missing"
+  exit 1
+}
+echo "iframe/fallback validation passed"
+
+echo
+echo "== Feature test 3: open-in-tab action exists =="
+echo "$page" | grep -q 'id="openInTabBtn"' || {
+  echo "Expected Open in tab button missing"
+  exit 1
+}
+echo "$page" | grep -q "window.open" || {
+  echo "Expected window.open integration missing"
+  exit 1
+}
+echo "open-in-tab validation passed"
+
+echo
+echo "All TVDB embed feature tests passed."