The Warren Brown drama was originally set to conclude on September 20, but the last instalment - which features scenes of a violent attack on a female police officer - was pulled from the schedules following the deaths of two Greater Manchester policewomen in a gun and grenade attack.
The fourth and final episode has now been confirmed for Saturday, October 13 at 10.30pm.
Good Cop follows John Paul 'Sav' Rocksavage, a police constable who seeks revenge on a gang of criminals who murder his partner (Tom Hopper) in a brutal ambush.
Stephen Graham, Aisling Loftus, Mark Womack and Kerrie Hayes also star in the series, which was written by Five Daughters scribe Stephen Butchard.
> Good Cop Warren Brown Q&A: 'The show's a thrill, dark, gritty'
> Good Cop Kerrie Hayes Q&A: 'I've been stalking police officers'
Watch a clip from Good Cop below: