I didn't want to put it in the thread that was created when it was aired first as I wasn't sure of spoilers. But the first season of Orphan Black will be reairing on BBCA starting on the 14th at 10PM.
I don't know much about it (and don't want to - I want to watch it fresh), but it does involve what sounds like the most complicated acting job possible, one actress playing multiple clones. I've heard rave reviews. Sounds like one of those shows too smart for network TV