"The Showing Up of Corporal Jones" is the fifth episode of the first series of the British comedy series Dad's Army. It was originally transmitted on Wednesday 4 September 1968.

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When Major Regan from GHQ inspects the platoon he decides that Jones must resign, as he is too old. But he also says that if Jones can complete an assault course in 15 minutes he can stay. The platoon organise an elaborate plan to keep Jones amongst them.

1. The platoon receive their uniforms in this episode.
2. This episode includes the only occasion Mainwaring says the word "bastard".
3. Strangely Wilson says "I've never heard you swear before, Sir" after Mainwaring says "Bloody cheek!" during The Lion Has Phones, an episode from Series 3 (1969), despite the fact he clearly hears Mainwaring say "the rotten bastard", initially thinking Mainwaring is directing the insult at him.
4. This episode was planned for transmission on Wednesday 3 July.