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.