Harrelson and Theroux lead the "White House Plumbers" cast — which also includes Lena Headey as Dorothy Hunt, Judy Greer as Fran Liddy, Domhnall Gleeson as John Dean, and Toby Huss as James McCord.
Others in the show's cast are Ike Barinholtz (Jeb Magruder), Kathleen Turner (Dita Beard), Kim Coates (Frank Sturgis), Yul Vazquez (Bernard "Macho" Barker), Alexis Valdés (Felipe De Diego), Nelson Ascencio (Virgilio "Villo" Gonzalez), Tony Plana (Eugenio "Muscolito" Martinez), Zoe Levin (Lisa Hunt), Liam James (Saint John Hunt), Kiernan Shipka (Kevan Hunt), Tre Ryder (David Hunt), David Krumholtz (William O. Bittman), F. Murray Abraham (Judge Sirica), Rich Sommer (Egil "Bud" Krogh), and John Carroll Lynch (John Mitchell).