Jeffrey took over the role of "George McFly" in the Back to the Future part 2 & 3 sequels. Originally being told that he was up to be a 'photo double', and then when cast as George, he was told that original actor Crispin Glover was unavailable to do reprise the role due to scheduling conflicts. When Jeffrey learned that production had no agreement with Glover for use of his likeness in the prosthetic makeups he wore while portraying George ages 17, 47 & 77, Jeffrey offered his photos and stories to help Glover with his case, which settled out of court, and caused SAG to instate a new rule that an actor's likeness cannot be used without their permission.