BBC One's Vigil took a racy turn as VERY saucy photos of the submarine's doctor was leaked to the police.
Viewers were gobsmacked when they got more than they bargained with snaps of Surgeon Lieutenant Tiffany Docherty in her lingerie.
The third episode offered more shocking revelations, including the romantic relationship between Tiffany and Elliot Glover.
The pair are now firmly under suspicion after a topless photo of Glover revealed their secret relationship.
Early on in the episode, a file Craig Burke's USB stick shows photos of Tiffany with an unidentified man.
However, a large dragon tattoo on the upper shoulder left viewers speculating who the mystery man could be.
For most of the episode, Amy is unable to figure out Kirsten's coded message - which says that while she has a weak visual on the man, he has "her favourite book."
It's only at the end of the episode that Amy spots a photograph of Glover in which the tattoo is visible.
Amy is convinced that Glover is not who he claims to be and has reasons to suspect him.
Meanwhile, Tiffany was reluctant to help Amy investigate the death of Burke.
During the episode, it was revealed that the drug test was likely falsified at the testing level - which put Tiffany in the frame.
Amy is convinced that Tiffany had the motive to poison Craig, with Amy claiming that she Burke was blackmailing her over the photos.
Tiffany revealed she did indeed swap some of the samples, but only to help her friends.
The doctor claimed she had no idea about the photos, despite Amy being convinced that she's hiding something.
Viewers at home will know that Glover later revealed that he was aware about the racy photo in question.
At the end of the episode, Glover and Tiffany have a frosty encounter when he leans in to kiss her.
Tiffany promises him that she "won't say anything", hinting that they are both implicated in something sinister.
Could Glover be responsible for Burke's murder?