Perry Mason - Season 5 Episode 11
The Case of the Left-Handed Liar

Health club instructor Ward Nichols wants to marry the daughter of his employer, Bernard Daniels, but Wards estranged wife, Veronica, is pressuring him for money and claiming to be pregnant. Things blow up in everyones face when Bernard is found crunched with a dumbbell at the club. Perry, as usual, arrives on the scene to get at the truth.