Dad's Army - Season 3 - Eps 5: Something Nasty in the Vault
The bank takes a direct hit during an air-raid, but the bomb fails to explode, leaving Mainwaring and Wilson stuck in the vault with it. When the bomb disposal officer leaves to collect the right tools, the platoon members take matters into their own hands.
About Dad's Army

Title: Dad's Army
First Air Date: 1968-07-31
Last Air Date: 1977-11-13
Status: Ended
Rating: 7.4/10 (from 73 votes)
Language: EN
Seasons: 10
Total Episodes: 77
Network: BBC One
Genres: Comedy
Production Companies: BBC
Synopsis
Introducing the Walmington-On-Sea home guard. During WW2, in a fictional British seaside town, a ragtag group of Home Guard local defense volunteers prepare for an imminent German invasion.
Cast

Arthur Lowe
Captain George Mainwaring

John Le Mesurier
Sergeant Arthur Wilson

Clive Dunn
Lance-Corporal Jack Jones

John Laurie
Private James Frazer

Arnold Ridley
Private Charles Godfrey

Ian Lavender
Private Frank Pike

Bill Pertwee
ARP Warden Bert Hodges

Edward Sinclair
Maurice Yeatman

Colin Bean
Private Sponge

Frank Williams
Reverend Timothy Farthing