That '70s Show (1998): Thank You

Eric hides the fact that he's failing math from Red because he wants to prove that he's starting to get serious about his future. Red is so impressed by his son's apparent maturity that he bumps Laurie from the adults' table at Thanksgiving and gives her seat to Eric. This makes Eric think that the time may finally be right to announce to his engagement to Donna. However, the woman that Kelso brings as his date to the Formans' dinner complicates this decision.