S1·E22 Who Killed Marty Kelso?

After a party celebrating his marriage to an Italian movie starlet, producer Marty Kelso falls down a flight of stairs and gets a letter opener stuck in his neck. His bodyguard/manservant calls the police and informs Burke that Kelso's three ex-wives (a former Olympic star, a screenwriter and a failed actress) were at the party, along with the Olympic star's surly husband and a film director. Clues pop up at the oddest times and in the most curious places. Les and George each claim the other overlooked vital information. Several people had good motives to murder Kelso, but Burke knows that just because a suspect seems obvious doesn't mean there might not be a set-up in the works.