Shetland: BBC One, 9pm
The second episode of the drama airs tonight, and Detective Jimmy Perez is still on the hunt for the murderer of Catherine Ross.
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The prime suspect for the crime is slowly revealed to be bizarre village loner Magnus, who was the last person to see Catherine alive. Perez struggles to make sense of the case, made harder by a previous missing person mystery that seems to be interconnected with the murder.
In addition, Perez is still dealing with the other villages and their habit of holding onto the past.
The Vampire Diaries: ITV2, 9pm
Katherine continues her plan to take control over Elena's body, and enlists the help of Nadia's friend Mia. She also uses Matt to gain personal information about Elena so that she can fool everybody at the party.
As the plan goes ahead and Katherine poses as Elena, she creates problems for her relationship with Damon.
Meanwhile, Caroline reveals her history with Klaus, which angers Tyler when he overhears, and Damon comes face to face with Aaron Whitmore.
Undercover Doctor: Cure Me, I'm Gay: Channel 4, 10pm
Embarrassing Bodies host Dr Christian Jessen is back with a new show, but this time he is the patient and not the doctor.
Jessen volunteers to undergo treatments which claim they can 'cure' homosexuality, including aversion therapy. The show gets more extreme as he meets with a priest who carries out exorcisms, and medics who blame childhood trauma as the cause of the 'illness'.
Doll & Em: Sky Living, 10pm
In the penultimate episode of the season, Em has been transformed into a 63-year old woman for her film and is feeling far from glamorous, but Doll is on hand to help her out.
As Em is still waiting to hear back from her audition she begins to fear that her career as an actress may be at an end, but Doll suddenly receives the opportunity of a lifetime.
