radio series, 'Don't forget the diver sir; do not forget the diver' about the character Deepend Dan. The episode sees the first appearance of Robert Raglan as Captain Square's Sergeant. He would later return in a semi-regular role as the 'Colonel'. Mainwaring says 'Stupid Boy' three times in this episode, once where Pike stands on the air pipe connected to Fraser's diving suit during a rehearsal for the exercise, again when he nearly gets caught on Fraser's lifeline and air pipe when Pike accidentally holds them at waist height during the rehearsal, and once more when Pike has difficulty cutting through a wire fence during the actual exercise. Radio episode "Don’t Forget the Diver" is the 22nd adapted radio episode, and the first of the second radio series (after the Christmas special episode, "Present Arms"), of Dad's Army. It has been regularly rebroadcast on BBC Radio 4 Extra or its predecessors. Synopsis The synopsis remains virtually unchanged from the TV episode, although there are a few minor changes in terms of actions performed by certain characters. Notes The main change from the original TV episode is that a watermill is substituted for the windmill. There is no scene in the radio episode in the pub or involving Square's survival trick with his pocket-watch. Cast Only two guest actors appeared in this radio episode, namely Edward Sinclair as The Verger and the actor who played Square's sergeant. Further reading External links Dad's Army (series 4) episodes Dad's Army radio episodes 1970 British television episodes