S04 Episode 1
Extortion
30 mins · Wed, 15 Sep 1971
S04 Episode 2
Million Dollar Buff
30 mins · Wed, 22 Sep 1971
S04 Episode 3
The Grandmother
30 mins · Wed, 29 Sep 1971
S04 Episode 4
The Sniper (1) (concl on The D.A., 8 Oct 71)
30 mins · Wed, 6 Oct 1971
S04 Episode 5
The Search
30 mins · Wed, 20 Oct 1971
S04 Episode 6
The Ferret
30 mins · Wed, 27 Oct 1971
S04 Episode 7
Truant
30 mins · Wed, 3 Nov 1971
S04 Episode 8
Ambush
30 mins · Wed, 10 Nov 1971
S04 Episode 9
Anniversary
30 mins · Wed, 17 Nov 1971
S04 Episode 10
Day Watch
30 mins · Wed, 24 Nov 1971
S04 Episode 11
Assassination
30 mins · Wed, 8 Dec 1971
S04 Episode 12
The Dinosaur
30 mins · Wed, 15 Dec 1971
S04 Episode 13
Pick-Up
30 mins · Wed, 29 Dec 1971
S04 Episode 14
Citizens All
30 mins · Wed, 5 Jan 1972
S04 Episode 15
The Princess and the Pig
30 mins · Wed, 12 Jan 1972
S04 Episode 16
The Tip
30 mins · Wed, 19 Jan 1972
S04 Episode 17
The Parole Violator
30 mins · Wed, 26 Jan 1972
S04 Episode 18
Adoption
30 mins · Wed, 2 Feb 1972
S04 Episode 19
Mary Hong Loves Tommy Chen
30 mins · Wed, 9 Feb 1972
S04 Episode 20
Sub-Station
30 mins · Wed, 16 Feb 1972
S04 Episode 21
Back-Up One L-20
30 mins · Wed, 23 Feb 1972
S04 Episode 22
Who Won?
30 mins · Wed, 1 Mar 1972
S04 Episode 23
Eyewitness
30 mins · Wed, 8 Mar 1972
S04 Episode 24
The Wednesday Warrior
30 mins · Wed, 15 Mar 1972