Steve Urkel first appeared on the 12th episode of the first season, "Laura's First Date", as a nerdy young boy who took Laura Winslow out on a date, where he is depicted as being madly in love with her.
Steve Urkel first appeared on the 4th episode of the first season, Rachel's First Date. On the 12th episode of the first season, "Laura's First Date", he reappears as a nerdy young boy who took Laura Winslow out on a date, where he is depicted as being madly in love with her.