Episode 18
Episode: 4x01 | Airdate: Sep 14, 1978
Episodes
Episode 19
Episode: 4x02 | Airdate: Sep 21, 1978
Episode 20
Episode: 4x03 | Airdate: Sep 28, 1978
Episode 21
Episode: 4x04 | Airdate: Oct 5, 1978
Episode 22
Episode: 4x05 | Airdate: Oct 12, 1978
Episode 23
Episode: 4x06 | Airdate: Oct 19, 1978
Episode 24
Episode: 4x07 | Airdate: Dec 21, 1978