Guest Stars Scott Nicholson as Colin Stiles Hiam Abbass as Marcia "Marcy" Roy Arian Moayed as Stewy Hosseini Zoe Winters as Kerry Castellabate Swayam Bhatia as Sophie Roy Alexander Skarsgård as Lukas Matsson Dasha Nekrasova as Comfry Quentin Morales as Iverson Roy Harriet Walter as Caroline Collingwood Hope Davis as Sandi Furness Pip Torrens as Peter Munion Ella Rumpf as Contessa Tomas Arana as Laurie Co Starring Robert S. Gregory as Dewi Swann Hermione Lynch as Bianca Angeliqa Devi as Wedding Planner Jeff Blumenkrantz as Simon Edgerton Faye Yvette McQueen as Samia Sarpong Jeffrey Grover as Gavin Bentner