He has a younger sister, Theresa "TK" Keiner (Danielle Harris), of whom he is overprotective. When McNulty left the cast toward the end of the second season, Harley made one more appearance (played by Kenny Johnston), only to be subsequently written out under the pretense of going to "juvenile boot camp". The original actor made one last token cameo appearance in the third season. Harley was later a recurring character on the sequel series "Girl Meets World". In the interim, Harley has become much more friendly; he cares a great deal about the students' well-being and is not proud of his past. Unlike their own school days, Harley now holds Cory in high esteem, mainly because it was Cory's influence that got him hired as custodian at John Quincy Adams Middle School, earning him the affectionate nickname "Janitor Harley" by the students. He is now very good friends with Cory and Topanga, and also with the four main kids (Cory's daughter Riley, Lucas Friar, Maya Hart, and Farkle Minkus). In the season 1 episode "Girl Meets Flaws", when Farkle is bullied by another student, Harley sympathizes with him and even confronts the bully about his actions. In all, Harley appeared in six episodes of the sequel, including the series finale, "Girl Meets Goodbye". When Danny McNulty left the show at the end of season 2, Griffin "Griff" Hawkins (Adam Scott) stepped in briefly as his replacement. A far different sort of bully than Harley. While much friendlier, Griff was a smooth-talking freeloader who used his wits and charm to weasel his way out of many an obligation and punishment. He was on the show from 1995–1996. In an episode of the sequel series "Girl Meets World", there's an easter egg that alludes to Griff. When Cory is presenting his class with awards, he gives Maya Hart the "Griff Hawkins Totally Cool" Award. Jedidiah (Peter Tork, Michael McKean, and Mark Harelik) and Rhiannon Lawrence (Annette O'Toole and Marcia Cross) are Topanga's estranged parents. Dialogue suggests they were married at the same age as Cory Matthews and their daughter, Topanga, however their relationship is not as strong due to Jedidiah's (off-screen) extramarital affair with a woman named Marie. For Topanga's sake and without her knowledge, Jedidiah and Rhiannon spend years in counseling in an effort to salvage their marriage.