Lt. Columbo (Peter Falk) encounters the most puzzling case of his police career when his prime suspect in a homicide case is slain. Robert Vaughn, Diane Baker, Wifred Hyde-White, John Dehner and Dennis Dugan guest star in this two hour drama directed by Patrick McGoohan.

Commodore Otis Swanson, an expert yachtsman, is presumed drowned in a boating accident. But Lt. Columbo tenaciously investigates the case, suspecting homicide. When Columbo finds key clues that point to Swanson’s money-hungry son-in-law, Charles Clay, as the prime suspect, Clay himself becomes victim of homicide. A puzzled Columbo digs deeper and unravels strong motives to suspect the commodore’s inner circle of family and coworkers. (1976)