Special Guest Stars John Cena as Ewan O'Hara Mena Suvari as Allison Crowley Guest Stars Kurt Fuller as Dr. Woodrow Juniper "Woody" Strode Jimmi Simpson as Dr. Mary Lightly Jazmyn Simon as Selene Gilmore Ralph Macchio as Nicholas "Nick" Conforth Zachary Levi as Thin White Duke Sam Huntington as Sam Sloan Julianna Guill as Dr. Butterfly McMillan Robert LaSardo as El Proveedor Charlotte as Heather Rockrear Emma Tremblay as Iris Vick Carlos Jacott as Gus's Boss Co Starring Sage Brocklebank as Buzz McNab Nathan Mitchell as Black Gentleman Ninja Mark Acheson as Beaten Criminal Seth Whittaker as EP Henchman #3 Dexter Bell as Security Guard S.E. Hinton voices Pony in a Onesie