S4E1 - The Clean Skins
While investigating the background of a young man involved in a car crash, Det. Banner comes across clues indicating that he was involved in an illegal racket.
Jan. 19, 1972, midnight
S4E2 - No Hard Feelings
Const. George Bell returns to Yarra Central for another spell of temporary duty, and once again his enthusiasm and eagerness turns the station upside down.
Jan. 26, 1972, midnight
S4E3 - A Continental Gentleman
A European paymaster is implicated in a payroll robbery, with tragic results. The Yarra Central police find that prejudice against immigrants in the district can affect their investigations.
Feb. 2, 1972, midnight
S4E4 - Once Bitten
Jim O'Brien is released on parole after serving 18 months of a long jail term. His homecoming is marred by treachery and a faithless wife.
Feb. 9, 1972, midnight
S4E5 - Pigs Is Pigs
Constable Dwyer attempts to establish a youth club for delinquent kids, and becomes involved with the theft of some power tools, a cop with a chip on his shoulder, and a tough old matriarch named Porky.
Feb. 16, 1972, midnight
S4E6 - The Man Who Dug His Own Grave
Police informer Sammy Goodall finds his life is threatened by criminal associates in the Melbourne underworld.
Feb. 23, 1972, midnight
S4E7 - To Bribe Or Twist
The local newspaper and the Yarra Central police become involved when a wealthy woman, the wife of a successful business man, steals jewellery from a shop.
March 1, 1972, midnight
S4E8 - The Warder
A prison officer is reported missing. He is later found unconscious but unharmed, and police investigate a possible case of revenge or blackmail by ex-prisoners.
March 8, 1972, midnight
S4E9 - Man's Only A Battler
Constable Dwyer orders Barry Ward, a young owner-driver, to have his truck made roadworthy within five days. But when Barry finds he cannot pay for the repairs he is drawn into crime.
March 22, 1972, midnight
S4E10 - Plain Rosy
March 29, 1972, midnight
S4E11 - Dad
April 12, 1972, midnight
S4E12 - A Place Of My Own
April 19, 1972, midnight
S4E13 - Rogue's Gallery
April 26, 1972, midnight
S4E14 - I'm Going To Smash Something Everyday
May 3, 1972, midnight
S4E15 - You Think You've Got Troubles
May 17, 1972, midnight
S4E16 - Finders Keepers
May 24, 1972, midnight
S4E17 - Butcher, Baker, Troublemaker
May 31, 1972, midnight
S4E18 - Herbie
June 7, 1972, midnight
S4E19 - You Can't Win 'Em All
June 21, 1972, midnight
S4E20 - The Electro Static Organ Revitaliser
June 28, 1972, midnight
S4E21 - A Nice Safe Job
July 5, 1972, midnight
S4E22 - A Waste Of Time
July 12, 1972, midnight
S4E23 - All Women Are Liars
July 19, 1972, midnight
S4E24 - Cry of Vengeance
Aug. 2, 1972, midnight
S4E25 - Only A Twenty-Two
Aug. 9, 1972, midnight
S4E26 - Come The Revolution
Aug. 16, 1972, midnight
S4E27 - For The Love Of Money
Aug. 23, 1972, midnight
S4E28 - One More War
Aug. 30, 1972, midnight
S4E29 - Birds Of A Feather
Sept. 6, 1972, midnight
S4E30 - Andrew Shannon
Sept. 13, 1972, midnight
S4E31 - Hide And Seek
Sept. 20, 1972, midnight
S4E32 - Natural Victim
Sept. 27, 1972, midnight
S4E33 - When In Rome
Oct. 4, 1972, midnight
S4E34 - A Bad Lot
Oct. 11, 1972, midnight
S4E35 - The Oracle
Oct. 18, 1972, midnight
S4E36 - Room For Danger
Oct. 25, 1972, midnight
S4E37 - Trap For Young Players
Nov. 1, 1972, midnight
S4E38 - Senior Stewart
Nov. 8, 1972, midnight