the animated series, Griff makes a brief cameo appearance in the episode "Solar Sailors" where his grandson, Ziff (also voiced by Wilson), is detained after he attempts to sabotage Marta McFly's space cruiser due to his hatred towards her family. Griff's last name is never mentioned in the movie, which means he could either be the son of Biff's son Biff Jr, or the son of Biff's daughter, Tiffaney, but in the animated series, Ziff says that both he and Griff are Tannens. Biff Tannen Jr. In the animated series, Biff Jr. (voiced by Benji Gregory) is the son of Biff Tannen. Like his father and paternal relatives, he likes to bully and steal from children around him including Jules and Verne Brown with whom he developed a feud. In addition, Biff Jr. delights in vandalizing other people's properties. Biff Jr. lives with his father with whom he has an abusive relationship. Strickland family Gerald Strickland Gerald Strickland (portrayed by James Tolkan) is the strict principal of Hill Valley High School. He is a descendant of Chief Marshal James Strickland of Hill Valley 1885. He frequently makes a great noisy show of sternly reprimanding his students for faults such as "slacking" or liquor consumption, although he himself is revealed to sneak a drink of alcohol at his desk at school. There is a reference from Verne Brown that there is another Strickland who works at Hill Valley Elementary School as its vice principal. James Strickland James Strickland (portrayed by James Tolkan in Back to the Future Part III) is the chief marshal of Hill Valley in 1885 and an ancestor of Mr. Strickland. He also has an unnamed son (portrayed by Kaleb Henley). In a deleted scene not included in the final cut, and in the movie's novelization, Strickland is killed by Buford Tannen. In the theatrical release Strickland simply remains absent for the latter half. In the Back to the Future game, Edna Strickland in 1986 notes that James was shot and killed by Buford. Marty remarks that's a detail he doesn't remember, possibly a reference to the differences between the film and the movie novelization. Edna Strickland Edna Strickland (voiced by Rebcca Sweitzer) is introduced in Back to the Future: The Game where she is the sister of Gerald Strickland. She is somewhat nicer than her brother, but still set in her ways towards upholding strong morals and