The announcement of the fourth series comes ahead of the release of series three, Bulletproof: South Africa this January.
Walters and Clarke will return as the dynamic cop duo Ronnie Pike and Aaron Bishop, who find themselves caught up in a vicious murder that puts their jobs, families and lives at risk.
The pair must work together and use all of their skills to defeat the most evasive villain they have ever come across.
“I am so pleased we can continue the journey of Bishop and Pike,” said Ashley Walters.