Here are our 15 teasers for the fourth episode of the fourth series, A Spectre Calls. A spoiler-free review to follow.

1. “Werewolves can’t be ghosts, that would really mess things up”
2. Hal and Tom are a gay couple
3. Tom’s been feeding baby Eve mini-Babybels!
4. Someone vanishes into thin air
5. Tom has the worst 21^st birthday ever
6. “What did Nina mean about George’s GQ magazine?”
7. Hal pulls off some fine Sherlock-style deductions
8. Cutler becomes chummy with someone unexpected
9. Tom’s night out on the town ends badly
10. “It drove Mitchell to suicide, from what I’ve heard”
11. Kirby can pull off some mean dance moves
12. “Someone fell out of the wrong side of the coffin this morning”
13. She’s back on the TV again
14. Things look very, very bad for Annie
15. The person with the burnt arm is seemingly revealed by the episode’s conclusion

A Spectre Calls airs this Sunday at 9pm on BBC3.