Guest Stars Liam Garrigan as King Arthur Amy Manson as Merida Joana Metrass as Guinevere Elliot Knight as Merlin Sinqua Walls as Lancelot Paul Telfer as Lord Macintosh Co Starring Jordan Olson as Brother #2 Matthew Olson as Brother #3 Colton Barnert as Brother #1 Marco D'Angelo as Lord MacGuffin Josh Hallem as Lord Dingwall Uncredited Ingrid Torrance as Nurse Ratched