diff --git a/src/main.ts b/src/main.ts
index 8107dc0..9e6c188 100644
--- a/src/main.ts
+++ b/src/main.ts
@@ -53,11 +53,20 @@ const game = new Phaser.Game({
 const ROUTES = { night: 'Night', parade: 'Parade', floor: 'FloorDemo', juice: 'JuiceDemo' } as const;
 type RouteKey = keyof typeof ROUTES;
 
+// Only ROOT scenes are routed. Door, Floor and NightSummary belong to Night and
+// go down with its teardown; stopping them from here used to leave a live Night
+// driving a dead Door — a black screen with no way back, because the guard
+// below then declined to restart the already-active Night.
+const ROOT_SCENES = ['Roster', 'Night', 'Parade', 'FloorDemo', 'JuiceDemo'] as const;
+
 const showScene = (target: (typeof ROUTES)[RouteKey]): void => {
-  for (const key of ['Roster', 'Night', 'Door', 'NightSummary', 'Parade', 'FloorDemo', 'JuiceDemo']) {
+  for (const key of ROOT_SCENES) {
     if (key !== target && game.scene.isActive(key)) game.scene.stop(key);
   }
-  if (!game.scene.isActive(target)) game.scene.start(target);
+  // Pressing a route key for what is already running means "start it over".
+  // It is the only way to get a fresh night out of N mid-shift.
+  if (game.scene.isActive(target)) game.scene.stop(target);
+  game.scene.start(target);
 };
 
 // RosterScene is scene[0] and auto-starts. Hash routing must wait until it is
diff --git a/src/scenes/door/NightScene.ts b/src/scenes/door/NightScene.ts
index aa4fdea..4726c25 100644
--- a/src/scenes/door/NightScene.ts
+++ b/src/scenes/door/NightScene.ts
@@ -573,6 +573,12 @@ export class NightScene extends Phaser.Scene {
   }
 
   private teardown(): void {
+    // Door and Floor are this scene's children — they hold this night's bus,
+    // clock and context. A Night that goes away without taking them leaves two
+    // scenes driving a dead bus, and a restarted Night would launch a second
+    // pair on top of the first.
+    this.scene.stop('Door');
+    this.scene.stop('Floor');
     for (const off of this.offs) off();
     this.offs = [];
     this.meters?.destroy();