Sandi Toksvig takes a QI look at the Wild West with Alex Brooker, Jo Brand, Eshaan Akbar and Alan Davies.

November, 1987. The gang evades the military to scour the Upside Down for Vecna — but fails to notice a threat lurking closer to home.

After a vicious attack at the Wheeler home, Mike and Nancy confront the cost of secrecy, while El and Hopper embark on a rescue mission.

Will gains unique insight into Vecna's next move, giving the crew an opportunity to set a trap. Holly explores her new surroundings.

The military tightens its grip on the town. Mike, Lucas and Robin orchestrate a daring escape. El comes face-to-face with the enemy.

Jimmy welcomes actor Tim Allen, actress Lili Reinhart, and comedian Dusty Slay.