1. Dark So Early, Dark So Long

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. 15 September 1971. 52 min

A blackmail victim is headed for prison.

2. Cold Trail

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. 22 September 1971. 52 min

A big kidnapping plot and an insignificant victim.

3. A Step in Time

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. 29 September 1971. 52 min

Mannix is the eyewitness of a murder; reportedly, it occurred a year before.

4. Wine From These Grapes

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. 6 October 1971. 52 min

A labor dispute in his home town ends in murder.

5. Woman in the Shadows

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. 13 October 1971. 52 min

Soviet agents want Marx's manuscript of Das Kapital, and a young woman has just inherited part of it.

6. Days Beyond Recall

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. 20 October 1971. 52 min

A skid row bum is concealing his identity.

7. Run Till Dark

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. 27 October 1971. 52 min

A contract is taken out on a Little League manager.

8. The Glass Trap

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. 3 November 1971. 52 min

Strange circumstances surround an arrest by Mannix.

9. A Choice of Evils

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. 10 November 1971. 52 min

Peggy is kidnapped to force Mannix into an investigation.

10. A Button for General D

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. 17 November 1971. 52 min

The Case of the Singing Harp: a singer is kidnapped to reveal hidden loot.

11. The Man Outside

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. 24 November 1971. 52 min

Blackmail has its twists and turns.

12. Murder Times Three

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. 1 December 1971. 52 min

Hired and fired, Mannix pursues a missing person.

13. Catspaw

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. 8 December 1971. 52 min

Blackmail turns to murder and beyond.

14. To Save a Dead Man

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. 15 December 1971. 52 min

Evidence rules out one confession, indicates another.

15. Nightshade

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. 29 December 1971. 52 min

Disappearing enemies and friends force Mannix into a blackmail investigation.

16. Babe in the Woods

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. 5 January 1972. 52 min

Murder on the golf course leads to open season on Mannix, who's looking for valuable microcircuit plans hidden by the victim.

17. The Sound of Murder

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. 12 January 1972. 52 min

A dubious client is caught in his own machinations.

18. Moving Target

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. 19 January 1972. 52 min

The fictitious name on a partnership contract apparently comes to life.

19. Cry Pigeon

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. 26 January 1972. 52 min

Mannix in the middle of a gang war.

20. A Walk in the Shadows

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. 9 February 1972. 52 min

In defense of a client accused of murder.

21. Lifeline

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. 16 February 1972. 52 min

A singer piles into mounting trouble with the law.

22. To Draw the Lightning

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. 23 February 1972. 52 min

Was a police shooting premeditated? Mannix is on (and off) the case.

23. Scapegoat

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. 1 March 1972. 52 min

Mannix transports jewels from London, or is that his double?

24. Death in the Fifth Gear

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. 8 March 1972. 52 min

A racing accident lays Mannix up. While recuperating, he hears threats against him, but are they real?