We're Doomed! The Dad's Army Story tells of the struggles creators Jimmy Perry and David Croft had to endure to get the classic comedy on screen.
The stills show Friday Night Dinner's Paul Ritter and Game of Thrones actor Richard Dormer as Perry and Croft, respectively, and John Sessions as a dead ringer for Arthur Lowe.
EastEnders star Shane Richie will play Bill Pertwee in the one-off film, with the rest of the Dad's Army actors portrayed by Julian Sands (as John Le Mesurier), Mark Heap (as Clive Dunn), Kevin Bishop (as James Beck), Michael Cochrane (as Arnold Ridley) and Ralph Riach (as John Laurie).
Meanwhile, Keith Allen will appear as TV executive Paul Fox and Sally Phillips will play Croft's wife Ann.
The drama has been written by Stephen Russell (Shameless) and