Hodgson, left, with his unsinkable comedy crew.Two decades since he made watching lousy movies on Comedy Central one of the funniest ways to waste a mid-'90s afternoon, Joel Hodgson has found a new, if similar, calling: a live touring show, Cinematic Titanic, with the original Mystery Science Theater 3000 cast silhouetted against campy sci-fi flicks.When Cinematic Titanic last played to a Dallas audience, it was just the show's second performance, as Hodgson began thinking seriously about a runn