Desperate to be helpful, Lucifer assists an exasperated Carol investigate a drag queen's death. Ella and Chloe look into Carol's mysterious background.

Fisher turns to "Love Sensei" Jaget for help in getting a date with Lex. When Jaget's elaborate plan causes Lex's dog to go missing, Fisher must help Lex find her dog without everyone discovering the truth behind his disappearance.

At the bunker, the trial soon gives way to more twisted schemes. The group searching for seeds encounters a disoriented stranger.

At Gyenorvya's Pride celebration, Q-Force races to stop a royal wedding - and save the world.

Dale's career and his relationship with Helen couldn't be going any better, until his prized interview with an HIV-positive mother goes horribly wrong. In the eye of a media storm, buried secrets come to light.

It's the start of 1971 - though wearied from the events of the past year, there's no chance of "light duties" at the CID. Crestfallen and rarely without a scotch in hand, Endeavour finds himself right back in the thick of it when an explosive murder at an Oxford college has potentially far-reaching political ramifications. Meanwhile, the IRA have made a threat against the life of the Oxford Wanderers' star striker, and Endeavour is tasked with the duty of acting bodyguard.

Kirsten closes in on the killer, but their capture reveals the grave threat that Vigil faces. On the submarine, Amy makes a terrifying discovery.

Jo wakes in a pool of blood at the bottom of her stairs, having forgotten the last year. She struggles to piece her life together, and fears her family are keeping secrets.