Boards
List of television series cancelled before airing an episode
http://en.wikipedia.org/wiki/List_of_television_series_cancelled_before_airing_an_episode
The Dictator (Spring 1988)
This CBS sitcom, which starred Christopher Lloyd as a former dictator of a foreign country now living in a laundromat, was ready to air as a Spring replacement show, and ads ran in TV Guide and on the network announcing its debut. The show was pulled before a single episode aired, owing in part to a Writers Guild of America strike.