But that's not the surprising part. In the episode "Invasion of the Third World Body Snatchers" Woodward appears in a single scene, as the accidentally-heisted corpse of said dad. His only action is to flop over from being propped up against a wall in an alley, and then to roll his face into a hat when Joe Coffee releases his shoulder.
Since it was at the end of a multi-episode arc for the character, I'd guess that they filmed this shot during his work on the previous episode or two, while they had him available.