ITV has announced that Ridley will return for a second series, with Adrian Dunbar reprising his role as the titular detective.
The show has been recommissioned for four new two-hour episodes following the success of series one, which averaged 6.3 million viewers when it aired last year.
Returning alongside Dunbar is Bronagh Waugh as DI Carol Farman, Ridley's former protégée who now heads up investigations.
"There can be no greater endorsement of hard work and talent than the recommission of a series and to that end we have to thank ITV and the British public for taking to Ridley in such numbers," said Dunbar.
"We shall certainly work just as hard to keep the standard we have set and I look forward to developing Ridley as a character over the next four episodes."
Writer Paul Matthew Thompson added: "Adrian Dunbar's brilliant portrayal struck a chord with ITV viewers, and I can't wait to share what happens next, as the singing detective settles into his new role of Copelton Police Consultant.
"Ridley's unique and idiosyncratic approach to crime solving will once more be at the forefront of each feature length investigation. His animated partnership with DI Carol Farman will be tested, as together they set out to solve some dark and unsettling crimes."
Filming on the new series will take place this autumn for an expected broadcast in early 2024.
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