CHIN's

Linda throws herself into a deeply personal mission. Maze unmasks a blast from the past. Amenadiel ponders a new job.

When an ecstasy cook-turned-chemistry-teacher is found murdered in a cozy Los Angeles suburb, Lucifer and Pierce must go undercover to help track down the killer. Meanwhile, Maze has a newfound attraction for someone that she used to despise and Charlotte has a revelation.

Lucifer must find the antidote to the Professor's poison before it kills Chloe. He travels to hell to find the Professor's soul and get him to turn over the antidote. While he's there, he is forced to confront his guilt about Uriel's death. Mom heads to hell to get Lucifer back, but Lucifer still feels betrayed by his parents because of something he discovers.

When Lucifer is framed for murder, he and Chloe must work together to clear his name and prove the identity of the true killer.

Kelso invites the gang to an expensive dinner but skips on the bill, leaving Eric and Donna in the restaurant with no money. The two of them decide to shed their "square" personalities and get back at the gang. Bob is upset that Red didn't offer him a job at Price Mart.

Red and Bob take the guys deer hunting; Hyde chills out, Fez bags dinner using only a few primitive weapons, Kelso is a menace with his gun, and Red and Eric bond in the deer blind. Meanwhile, Kitty and Midge have a girls' night with Donna, Jackie and Laurie, but with nothing to talk about, the end up playing poker.

Jackie dumps Kelso after he makes out with Pam Macy and invites everyone but him to her parent's ski cabin for the weekend. Eric, excited about what this could mean for him and Donna, pays no attention to Kelso's whining about being left behind or Red's tips about driving in the snow. He doesn't realize that Hyde keeps hitting on Donna and Kelso plans on following them to the lodge. Also, Kitty gets mad at Red over a past indiscretion and Fez has his first experience with snow.

A class trip turns disastrous when Jess tries to avoid showing favoritism to Ryan; Schmidt develops an ulcer; Winston becomes fixated on wearing a crystal.

After her breakup with Jeff, Jules turns to Bobby for some cheering up. But when a bottle of wine leads to a passionate kiss, will they agree it was only a casual meaningless kiss? Meanwhile, Laurie discovers a thing that both Jules and Grayson have in common, while Travis plans with Kylie don't go as planned.

The Detective Boys discover the pattern of arson and manage to find the arsonist, but the final burning warehouse contains a handcuffed Takagi! Can Sato resolve a past problem relating to her father’s death and save Takagi?