We have threads for Doctor Who and British Television, you could've used one of those...
Anyway, SJA is great. It's a kids show, but you wouldn't know it, as the writers are the same guys who write Doctor Who. You forgot one thing about episodes 5 and 6. The 11th Doctor isn't the only guest star. Seen Doctor Who 1971-4? The companion in that era was Jo Grant, Sarah's immediate predecessor. She's in those episodes too. And we see flashbacks to Docs 1, 2, 3, 4 and 10.