: In a notable continuity error, Donna's mother Midge mentions a second daughter named Valerie who is away at college; this character is never seen or mentioned again in the series.
: This episode marks the first appearance of Laurie Forman. [S1E2] Eric's Birthday
: Eric's birth date is given as May 19, 1959, in this episode, though later seasons shift his birth year to 1960. "That '70s Show" Eric's Birthday (TV Episode 1998) - IMDb : In a notable continuity error, Donna's mother