Iwan Rheon and Antonia Thomas will not return for the fourth series of Misfits, leaving only two (out of five) original characters.
In its fourth series, Being Human [UK] is down to one (out of five).
I don't know the ins and outs of British television production, but it seems like actors are unrestricted free agents. It seems like actors run shows, not writers.
Meanwhile in America: "Breakout Star of 2011" Shailene Woodley is stuck doing 26 more episodes (at least) of The Secret Life of the American Teenager.
Idea: An amusement park composed of rides and attractions that other amusement parks discontinued – the E.T. and Back to the Future rides at Universal Studios, Mulholland Madness at California Adventure…