Milo complains that Grandparents Day is coming up at school and doesn’t feel Henry is interesting enough to participate. Lena and the kids urge Martin to reconnect with his long-estranged father, Brock (guest star Ron Perlman), to rebuild their relationship. Meanwhile, Lisa continues to struggle financially and considers moving back home with her parents. Elsewhere, after listening to a true crime podcast, Maya worries that Frank has a dark past he has been hiding.