The general mind-fuckery associated with watching almost any episode from season five onwards of the new Doctor Who. Written by Steven Moffat and featuring Matt Smith as the
Eleventh Doctor, Karen Gillan as Amy Pond,
Arthur Darvill as Rory Williams, and Alex Kingston as Dr. River Song, the episodes often leave subtle hints as to what's going on without giving a straight answer until the very end (and sometimes not even then).