How many times does it take to steal the same diamond?

Robert Redford, George Segal and Zero Mostel head a crack cast in this hilarious comedy about jewel thieves out to score the biggest heist of their lives. When John Dortmunder (Redford) learns that a huge, rare diamond is just waiting to be lifted in Manhattan, he assembles a team of pros to try to steal the stone. But all that glitters is not easily gotten, and, despite their careful planning and execution, actually stealing the gem proves a challenge far greater than any of the men bargained for.