Donna is still furious with Eric over his decision to spend a year in Africa. Jackie announces she's been offered a job in Chicago - and demands Hyde decide whether they should get married. Red introduces Charlie, the son of a fellow war vet, who unwisely invites the gang to visit his father's beer warehouse. Hyde makes his choice - but Jackie has already left.

Hyde hints he was willing to marry Jackie to stop her leaving for Chicago. New guy Charlie is in the doghouse after turning up drunk and dressed as a schoolgirl. Fez and Kelso discover Jackie is still in Point Place. Donna tries to come up with a leaving gift for Eric, who departs for Africa in three days. Charlie accidentally sees Kitty naked, but it's Red who gets into trouble. Eric's present turns out to be Donna, dressed as Princess Leia. Hyde doesn't know how to react when Jackie repeats her ultimatum, and lets her walk off, angry. Kelso offers to give her a ride to Chicago. Charlie tries to get back on Red's good side - with typically disastrous results. Kelso tries to dump Jackie at the bus station, but she demands he take her all the way. Fes tries to tap into Eric's Star Wars fantasy with Donna.

Jackie tries to hide from Hyde while pleading with Kelso for a ride to Chicago; Eric's grand farewell to Donna doesn't go quite as planned.

It's a month since Eric left for Africa and Hyde disappeared in Chicago; Kitty is preparing a tape to send to Eric. She confesses to sampling some of the guys' stash. Kelso now claims he didn't actually have sex with Jackie, who's just back and furious with him. Hyde returns and punches Kelso. Charlie falls from the water tower - and dies (eliminating himself from the role of replacement Eric). Jackie hears Hyde was intending to propose in Chicago, and tries to make up. He says he's not ready to get married yet - just in time for the arrival of Sam, who announces she and Hyde are already married.

It is New Year's Eve and is the last day of the '70s. Kitty is having second thoughts about selling the house and moving to Florida, even though Red thinks she is happy they are moving. Donna has just broken up with Randy and is moving to college. Jackie realizes she loves Fez. Bob decides that he's moving to Florida and open a bait shop. Eric says he's coming home from Africa.