Don Handfield Creator Richard Rayner Creator Tom Cullen Landry Actor Padraic Delaney Gawain Actor Simon Merrells Tancrede Actor Jim Carter Pope Boniface VIII Actor Olivia Ross Queen Joan of Navarre Actor Ed Stoppard King Philip IV Actor Julian Ovenden William de Nogaret Actor Sabrina Bartlett Princess Isabella Actor Bobby Schofield Parsifal Actor Sarah-Sofie Boussnina Adelina Actor Jeremy Renner Executive Producer Jeff Pinkner Executive Producer