Rob Lowe Father Jude Sutton Actor Jenna Fischer Rhonda McNeil Actor Megan Mullally Leanne Actor Mathew Baynton Jamie Winton, Ariel Conroy Actor Joel Fry Dave Bosley Actor Paterson Joseph General Arnold Gaines Actor Gaia Scodellaro Sister Celine Leonti Actor Pauline Quirke Paula Winton Actor Kyle Soller Scotty Actor Diana Rigg Guest Star Iain Hollands Executive Producer Juliette Howell Executive Producer Lynn Horsford Executive Producer Tim Bevan Executive Producer Eric Fellner Executive Producer Jo Ann Alfano Executive Producer Cameron Roach Executive Producer Lizzie Gray Executive Producer Andrew Conrad Executive Producer