<P> Eric Tramer (Josh Hoffman) is Jessie's stepbrother from New York (in the two - part season 3 episode "The Wicked Stepbrother"). At first excited to have a new stepbrother, Jessie quickly grows to dislike his rough, confrontational and offensive personality . Eric causes trouble and conflict at Bayside, particularly with Zack who feels threatened by the new prankster bad - boy, even going so far as to offer up Mr. Belding's car for auto shop class dissection to get Zack into trouble . However, after a punch and a speech from Jessie (after he said she was "just a chick"), he reforms his ways, entirely reassembles Belding's car, and apologizes to all . He was planning to return to New York City, but the gang, particularly Lisa, who had developed feelings for him, convinces him to remain at Bayside . </P> <P> Mr. Turtle (Henry Brown) appears in the episode "The Lisa Card". He was Lisa's father, who gave Lisa her first credit card for' emergencies only,' however, she spends nearly $400 on clothes with the credit card . At the end of the episode, she confesses that she spent the emergency credit card balance on clothes, and Mr. Turtle forces her to pay the credit card off herself . </P> <P> Lisa's mother Judy Turtle (Susan Beaubian) appeared in two episodes of the series, "Operation Zack" and "Drinking and Driving". In "Operation Zack", she is Zack's doctor after he accidentally breaks his leg when Mr. Belding bumps into him in the locker room . In "Drinking and Driving", Lisa crashed her car after getting drunk at a party, and has to deal with the repercussions of her actions, including telling Judy what she did to her car . </P> <P> Roberta Powers (Ruth Buzzi) appeared in the episode "House Party". She is Screech's mom, who is a huge Elvis fan . In the episode, she trusts Screech to be home alone for a weekend and gives him a long list of rules to abide by . Her favorite Elvis statue gets broken by Screech's girlfriend, Violet, and the gang has to throw a party to raise money for the statue replacement . </P>

Who played lisa turtle mom on saved by the bell