Season 6
24 episodes

1. The Open Web
52m · Sep 17, 1972
A gang boss engineers a deceptive getaway.

2. Cry Silence
52m · Sep 24, 1972
A priest's vows give a murderer a second chance.

3. The Crimson Halo
52m · Oct 1, 1972
A medical practitioner finds that someone is out to get him.

4. Broken Mirror
52m · Oct 8, 1972
A yachting misadventure draws Mannix into its deeps.

5. Portrait of a Hero
52m · Oct 15, 1972
An aircraft prototype is debuted under mysterious circucmstances.

6. The Inside Man
52m · Oct 22, 1972
Undercover in New Orleans.

7. To Kill a Memory
52m · Oct 29, 1972
A amnesiac veteran is up to his stripes in mischief.

8. The Upside Down Penny
52m · Nov 5, 1972
A stamp collection goes missing, and a starving artist gets rich.

9. One Step to Midnight
52m · Nov 12, 1972
Return of a gang boss with indeterminate friends and enemies.

10. Harvest of Death
52m · Nov 19, 1972
Rivalry amongst the orange trees.

11. A Puzzle for One
52m · Nov 26, 1972
A colleague's murder leaves an open casebook.

12. Lost Sunday
52m · Dec 3, 1972
Exposing a cover-up puts Mannix in hot water.

13. See No Evil
52m · Dec 10, 1972
A trail of evidence indicates a friend of Peggy's.

14. Light and Shadow
52m · Dec 17, 1972
A murder investigation bumps up against hard evidence.

15. A Game of Shadows
52m · Dec 24, 1972
A murder suspect is a man with no identity.

16. The Man Who Wasn't There
52m · Jan 7, 1973
A boastful nemesis takes Peggy for bait.

17. A Matter of Principle
52m · Jan 14, 1973
A traffic accident uncovers a clueless murder.

18. Out of the Night
52m · Jan 21, 1973
Peggy goes undercover to nab a dope ring.

19. Carol Lockwood, Past Tense
52m · Jan 28, 1973
A ship lost at sea leaves a survivor and a curious tale.

20. The Faces of Murder
52m · Feb 4, 1973
Conflicting confessions have to be sifted.

21. Search for a Whisper
52m · Feb 18, 1973
A political candidate asks to be vetted.

22. To Quote a Dead Man
52m · Feb 25, 1973
Someone is trying to kill a bum for his ""coat of many colors.""

23. A Problem of Innocence
52m · Mar 4, 1973
An ex-con's daughter is suspected in murders surrounding the unrecovered loot.

24. The Danford File
52m · Mar 11, 1973
Political blackmail turns to mischief when the blackmailer is found to be long dead.