The Bill actor TJ Ramini is reprising his role for as Zain Nadir for a special two-part episode of the ITV police drama, reports Digital Spy.
The 32-year-old played the corrupt cop for just under two years and left in February after being arrested on screen following the shooting of PC Honey Harman (Kim Tiddy). After becoming involved with drugs baron Kristen Shaw (Christine Stephen-Daly), Zain is spending 10 years behind bars for perverting the course of justice.
Zain's former colleage DCI Jack Meadows (Simon Rouse) meets him in prison while investigating another drugs case. Jack is forced to decide whether he can trust Zain to provide inside information.
Of Ramini's return, Executive Producer Johnathan Young said: "Zain has changed since being imprisoned. He's had to in order to survive, but Jack manages to tap into his inner conscience and we start to see a bit of the old Zain coming back."
He added: "The question is - where do his loyalties really lie?"
Ramini now lives in Los Angeles and has made an appearance in Boston Legal.