Justin Theroux Kevin Garvey Actor Amy Brenneman Laurie Garvey Actor Christopher Eccleston Matt Jamison Actor Liv Tyler Meg Abbott Actor Margaret Qualley Jill Garvey Actor Chris Zylka Tom Garvey Actor Carrie Coon Nora Durst Actor Kevin Carroll John Murphy Actor Jovan Adepo Michael Murphy Actor Scott Glenn Kevin Garvey Sr. Actor Regina King Erika Murphy Actor Janel Moloney Mary Jamison Actor Lindsay Duncan Grace Playford Guest Star David Gulpilil Christopher Sunday Guest Star Damien Garvey Chief Kevin Yarborough Guest Star Jeremy Ambrum Skip Guest Star Katherine Beckett Noreen Guest Star Shaka Cook Indigenous Officer No. 1 Guest Star Brian Christopher Sam, Grace's Husband Guest Star Maude Davey Hildy Guest Star Peter Flaherty Postman Guest Star Mirko Grillini Volkswagen, Suicidal Man Guest Star Julie Nihill Sharon Guest Star Lasarus Ratuere Officer Bardo Guest Star Carter Sand Young Kevin on Tape Guest Star Jenny Seedsman Naomi Guest Star Tysan Towney EMT Guest Star Francesca Waters Florence Guest Star Meyne Wyatt Rowan Guest Star Damon Lindelof Executive Producer, Writer Tom Perrotta Executive Producer Peter Berg Executive Producer Sarah Aubrey Executive Producer Tom Spezialy Writer Mimi Leder Director