diff --git a/lib/php/multimedia.php b/lib/php/multimedia.php
index 5baa961..43d74ad 100644
--- a/lib/php/multimedia.php
+++ b/lib/php/multimedia.php
@@ -635,6 +635,36 @@ try {
       resp(['ok' => true, 'items' => $rows]);
     }
 
+    case 'delete_show': {
+      $showId = (int)($in['show_id'] ?? 0);
+      if (!$showId) fail('bad params');
+      $pdo->beginTransaction();
+      try {
+        // Delete episodes belonging to this show's seasons
+        try {
+          $stmt = $pdo->prepare('DELETE e FROM episodes e JOIN seasons s ON s.id = e.season_id WHERE s.show_id = ?');
+          $stmt->execute([$showId]);
+        } catch (Throwable $e) {
+          // Fallback for SQL dialects not supporting multi-table delete
+          $stmt = $pdo->prepare('DELETE FROM episodes WHERE season_id IN (SELECT id FROM seasons WHERE show_id = ?)');
+          $stmt->execute([$showId]);
+        }
+
+        // Delete seasons
+        $stmt = $pdo->prepare('DELETE FROM seasons WHERE show_id = ?');
+        $stmt->execute([$showId]);
+        // Delete show
+        $stmt = $pdo->prepare('DELETE FROM shows WHERE id = ?');
+        $stmt->execute([$showId]);
+        $pdo->commit();
+        resp(['ok' => true]);
+      } catch (Throwable $e) {
+        $pdo->rollBack();
+        if (MM_DEBUG) fail('delete failed: '.$e->getMessage(), 500);
+        fail('delete failed', 500);
+      }
+    }
+
     case 'set_show_meta': {
       $showId = (int)($in['show_id'] ?? 0);
       if (!$showId) fail('bad params');