It retur ns six months after t he shocki ng finale of Season 3, and the team must ove rcome their grief to tackle a da ngerous crime wave . This t ime, the gl oves are w ell and truly off fo r Professor T in his lecture s and a new musical p ursuit, romance is very much a live for his mother Ade laide Tempes t (De la Tour) , and the line s between pr ofessio nal and per sonal becom e blurre d for therap ist Helen a Goldberg (Stevens on). Meanw hile, DI Maiya Goswami (Sunetra Sarker ) takes charge of the police force with seri es favorite DS Dan Winters (White) fierc ely at he r side.It returns six months after the shocking finale of Season 3, and the team must overcome their grief to tackle a dangerous crime wave. This time, the gloves are well and truly off for Professor T in his lectures and a new musical pursuit, romance is very much alive for his mother Adelaide Tempest (De la Tour), and the lines between professional and personal become blurred for therapist Helena Goldberg (Stevenson). Meanwhile, DI Maiya Goswami (Sunetra Sarker) takes charge of the police force with series favorite DS Dan Winters (White) fiercely at her side.詳情