Another brilliant challenge!

How do 

omniocular keep turning out these things? Most of us probably have one brilliant challenge in us, but to keep churning out great challenges month after month... that takes real inspiration.

They have put up another fantastic challenge - this one involves TV and film. I wasn't convinced... until I saw some of the stuff on offer, and now I'm full of ideas. I lack only the time to implement them, but all the same I am sorely tempted by the Antiques Roadshow... (would write a McGonagall/Miss Marple crossover as well, if I had the time to reread an author I don't really like that much, and wasn't fermenting Sherlock Holmes/HP crossover stories instead, but that's another tale).