Grown-ish 4x15 "Can’t Let You Go" Season 4 Episode 15 Sneak Peek - Jack and Diane come visit Zoey on campus for a school project. Meanwhile, Zoey and Luca try to figure out their working relationship. Tensions rise between Kiela and Doug. - Starring: Yara Shahidi, Francia Raisa, Luka Sabbat, Trevor Jackson