Actor Martin Sheen is set to lead the cast of a Moby Dick-inspired TV film. The Departed star will play real-life sailor Thomas Nickerson in Revenge of the Whale, which will centre on the time he spent as a cabin boy on the whaling ship The Essex, according to Variety.com. The two-hour special, based on the true events which inspired Herman Melville's novel, is slated to premiere later this year (14). It will also star Robin Hood's Jonas Armstrong and Love and Other Disasters' Adam Rayner. The movie will serve as network Animal Planet's first scripted programme.