Season
- Season 3 1959-09-18
- Season 2 1958-09-19
- Season 1 1957-09-20
Episode
- Episode 1: The Golden Look
- Episode 2: The Watchdog
- Episode 3: Neighborhood Killer
- Episode 4: Pete Loves Mary
- Episode 5: Face of Evil
- Episode 6: Street of Fear
- Episode 7: The Matinee Trade
- Episode 8: The Hard Case
- Episode 9: Killer in Town
- Episode 10: Diamond Hard
- Episode 11: The Alibi Witness
- Episode 12: The Specialists
- Episode 13: Family Portrait
- Episode 14: The Palace Guard
- Episode 15: The Slow Trap
- Episode 16: The Cover Up
- Episode 17: Blue Indigo
- Episode 18: The Long Ride
- Episode 19: The Shakedown
- Episode 20: Dolly's Bear
- Episode 21: Lover's Lane Killing
- Episode 22: The Frightened Wife
- Episode 23: The Black Mermaid
- Episode 24: The Man in Hiding
- Episode 25: Chicago Bluebeard
- Episode 26: Girl Lost
- Episode 27: Hideout
- Episode 28: Shot in the Dark
- Episode 29: The Twenty-Six Girl
- Episode 30: Fight
- Episode 31: Guilty Alibi
- Episode 32: The Healer
- Episode 33: Day of Terror
- Episode 34: The $20 Plates
- Episode 35: The Double Face
- Episode 36: The System
- Episode 37: Woman from Paris
- Episode 38: Accusation
M Squad Season 1 Accusation
Lt. Frank Ballinger is a no-nonsense plain clothes cop in the elite M Squad Division. The Squad's task is to root out organised crime and corruption in America's Second City, Chicago.
