diff --git a/homeassistant/components/cast/helpers.py b/homeassistant/components/cast/helpers.py
index 71caa6490d8..6d021d020c4 100644
--- a/homeassistant/components/cast/helpers.py
+++ b/homeassistant/components/cast/helpers.py
@@ -43,7 +43,7 @@ class ChromecastInfo:
         )
 
     @property
-    def manufacturer(self) -> str:
+    def manufacturer(self) -> str | None:
         """Return the manufacturer."""
         if self._manufacturer:
             return self._manufacturer
diff --git a/homeassistant/components/cast/home_assistant_cast.py b/homeassistant/components/cast/home_assistant_cast.py
index bb0354bb68e..fb2d790d03d 100644
--- a/homeassistant/components/cast/home_assistant_cast.py
+++ b/homeassistant/components/cast/home_assistant_cast.py
@@ -82,4 +82,5 @@ async def async_remove_user(
 
     if user_id is not None:
         user = await hass.auth.async_get_user(user_id)
-        await hass.auth.async_remove_user(user)
+        if user:
+            await hass.auth.async_remove_user(user)
diff --git a/homeassistant/components/cast/media_player.py b/homeassistant/components/cast/media_player.py
index 07e97dd1a7e..fde9b23704d 100644
--- a/homeassistant/components/cast/media_player.py
+++ b/homeassistant/components/cast/media_player.py
@@ -3,7 +3,7 @@ from __future__ import annotations
 
 import asyncio
 from contextlib import suppress
-from datetime import timedelta
+from datetime import datetime, timedelta
 import functools as ft
 import json
 import logging
@@ -169,8 +169,8 @@ class CastDevice(MediaPlayerEntity):
         self.cast_status = None
         self.media_status = None
         self.media_status_received = None
-        self.mz_media_status = {}
-        self.mz_media_status_received = {}
+        self.mz_media_status: dict[str, pychromecast.controllers.media.MediaStatus] = {}
+        self.mz_media_status_received: dict[str, datetime] = {}
         self.mz_mgr = None
         self._available = False
         self._status_listener: CastStatusListener | None = None
@@ -774,7 +774,7 @@ class CastDevice(MediaPlayerEntity):
         url_path: str | None,
     ):
         """Handle a show view signal."""
-        if entity_id != self.entity_id:
+        if entity_id != self.entity_id or self._chromecast is None:
             return
 
         if self._hass_cast_controller is None:
diff --git a/mypy.ini b/mypy.ini
index 5ed805a1b59..c3dd71d8229 100644
--- a/mypy.ini
+++ b/mypy.ini
@@ -1060,9 +1060,6 @@ ignore_errors = true
 [mypy-homeassistant.components.bsblan.*]
 ignore_errors = true
 
-[mypy-homeassistant.components.cast.*]
-ignore_errors = true
-
 [mypy-homeassistant.components.cert_expiry.*]
 ignore_errors = true
 
diff --git a/script/hassfest/mypy_config.py b/script/hassfest/mypy_config.py
index 8b9b15d35aa..dbde9516f8c 100644
--- a/script/hassfest/mypy_config.py
+++ b/script/hassfest/mypy_config.py
@@ -30,7 +30,6 @@ IGNORED_MODULES: Final[list[str]] = [
     "homeassistant.components.blueprint.*",
     "homeassistant.components.bmw_connected_drive.*",
     "homeassistant.components.bsblan.*",
-    "homeassistant.components.cast.*",
     "homeassistant.components.cert_expiry.*",
     "homeassistant.components.climacell.*",
     "homeassistant.components.cloud.*",