The sister-in-law of actor Mackenzie Crook has been missing from her home in Walberton, West Sussex, since 14 February.
The late star played Saucy Nancy in the original television adaptation of Barbara Euphan Todd's stories.
Mike Berry said Mackenzie Crook has no chance of matching the legacy of Jon Pertwee as children's TV scarecrow Worzel Gummidge.
The actor has moved away from the look of his iconic character Captain Ross by growing an impressive beard.
'The Office' star has been pictured for the first time in heavy prosthetic make-up as the beloved scarecrow character.