Episode 1
Episode: 4x01 | Airdate: Apr 14, 1978
Episodes
Episode 2
Episode: 4x02 | Airdate: Apr 21, 1978
Episode 3
Episode: 4x03 | Airdate: Apr 28, 1978
Episode 4
Episode: 4x04 | Airdate: May 5, 1978
Episode 5
Episode: 4x05 | Airdate: May 12, 1978
Episode 6
Episode: 4x06 | Airdate: May 19, 1978
Episode 7
Episode: 4x07 | Airdate: May 26, 1978
Episode 8
Episode: 4x08 | Airdate: Jun 2, 1978
Episode 9
Episode: 4x09 | Airdate: Jun 9, 1978
Episode 10
Episode: 4x10 | Airdate: Jun 16, 1978
Episode 11
Episode: 4x11 | Airdate: Jun 23, 1978
Episode 12
Episode: 4x12 | Airdate: Jun 30, 1978
Episode 13
Episode: 4x13 | Airdate: Jul 7, 1978