movie/series mash up you would like to see

[greenacrylicpaint]

I'll start with
jack reacher & trains planes and automobiles

Bosch & CSI las vegas

gilmore girls & bones

Buffy and Supernatural, giles with the bunker and men of letters etc

That would be amazing. I think Superwholock also deserves a mention.

Spooks and covert affairs
dark angel and town called eureka

that two would also be good combination

Brooklyn 99 and Ghostbusters

almost everything would work with bones

gray's anatomy & new amsterdam

sleepy hollow & twin peaks

Ghosts UK and Ghosts US. Either couple visiting the other house would be interesting.

matrix & crouching tiger

Dune and Star Wars

Homeland and Line of Duty. Imagine Saul Berenson meeting Ted Hastings!

a few good men & top gun

reacher (the series) & the night agent