Regina (Christina Moses) suspects that the reason Tyrell (guest star Adam Swain) isn't going to Yale next year is because his girlfriend doesn't want him to leave town. But when his girlfriend says she's also mad Tyrell's not going to Yale, Regina confronts Tyrell to get the truth -- and Regina was not expecting his response. From 'A Million Little Things' season 4 finale, episode 20, 'just in case.' Watch 'A Million Little Things' on ABC. Stream on Hulu.