>You can get a look this week at some currently hot actors in their prepeak days. Michelle Pfeiffer and Val Kilmer star in a rebroadcast of the 1985 ABC Afterschool Special One Too Many (Thurs., April 4, 4 P.M. ET). Mare Winningham and Lance Guest round out this tragedy of teenage drinking, which marked the network directorial debut of Peter Horton, the recently departed Gary on thirty-something. Then there’s Sarah Jessica Parker, beguiling star of screen (L.A. Story) and tube (Equal Justice). In 1982 she played an awkward high school freshman in the CBS sitcom Square Pegs. USA Network is showing the series, which also featured Jami Gertz and Tracy Nelson, weekends at 4 P.M. ET.