Episode 1
Episode: 4x01 | Airdate: Dec 30, 1980
Episodes
Episode 2
Episode: 4x02 | Airdate: Jan 2, 1981
Episode 3
Episode: 4x03 | Airdate: Jan 6, 1981
Episode 4
Episode: 4x04 | Airdate: Jan 9, 1981
Episode 5
Episode: 4x05 | Airdate: Jan 13, 1981
Episode 6
Episode: 4x06 | Airdate: Jan 16, 1981
Episode 7
Episode: 4x07 | Airdate: Jan 20, 1981
Episode 8
Episode: 4x08 | Airdate: Jan 23, 1981
Episode 9
Episode: 4x09 | Airdate: Jan 27, 1981
Episode 10
Episode: 4x10 | Airdate: Jan 30, 1981
Episode 11
Episode: 4x11 | Airdate: Feb 3, 1981
Episode 12
Episode: 4x12 | Airdate: Feb 6, 1981
Episode 13
Episode: 4x13 | Airdate: Feb 10, 1981
Episode 14
Episode: 4x14 | Airdate: Feb 13, 1981
Episode 15
Episode: 4x15 | Airdate: Feb 17, 1981
Episode 16
Episode: 4x16 | Airdate: Feb 20, 1981
Episode 17
Episode: 4x17 | Airdate: Feb 24, 1981
Episode 18
Episode: 4x18 | Airdate: Feb 27, 1981
Christmas Special
Episode: 4x19 | Airdate: Dec 28, 1981