The Flash Movie Will Recast Barry Allen's Father After Billy Crudup Departure The Flash movie from Warner Bros. Pictures had lost a key cast member as The Hollywood Reporter revealed Billy Crudupwould not return to the part of Dr. Henry Allen, father to Barry. Crudup not appearing was due to a scheduling conflict and not due to a lack of trying as the actor will be filming the new season of the Apple TV+ series The Morning Show. Now we've learned that the DCEU won't be waiting for Crudup to return as THR's Borys Kit reports: "The part of Barry Allen's father will be recast. It was not written out."