Guest Stars Matt Lucas as Nardole Nonso Anozie voices Voice of Hydroflax Greg Davies as King Hydroflax Phillip Rhys as Ramone Anthony Cozens as Concierge Chris Lew Kum Hoi as Alphonse Rowan Polonski as Flemming Robert Curtis as Scratch Nicolle Smartt as Receptionist Liam Cook as King Hydroflax's Body