A comic play by Creator/GeorgeBernardShaw set during UsefulNotes/TheAmericanRevolution, which tells of the title character, Richard Dudgeon, and his opposite, the Rev. Anthony Anderson, and the events which follow when British soldiers come to arrest Anderson for treason and Dudgeon takes his place. A further element is how Anderson's wife, Judith, rapidly goes from loathing Dudgeon to falling in love with him. Adapted into a movie several times; most notably in 1959, starring Creator/KirkDouglas as Richard Dudgeon, Creator/BurtLancaster as Anthony Anderson, and Creator/LaurenceOlivier as General John Burgoyne.
!!The Devil's Disciple provides examples of:
* AggressiveNegotiations: Played with near the end, when Anthony Anderson negotiates with Gen. Burgoyne for Richard Dudgeon's freedom. [[note]]Not only is Anthony holding several high-ranking officers prisoner (including Gen. Philips), but he also knows that Gen. Howe is way out of position in New York, not Albany where he should be. In short, he's got Gen. Burgoyne over a barrel, and they both know it.[[/note]]
* AntiVillain: General Burgoyne is the perfect gentleman, and obviously respects Dudgeon.
* BlackSheep: Richard Dudgeon.
* CatchPhrase: Major Swinden's repeated cry of "Monstrous impudence!"
* TheCavalry: Anderson comes riding in at the last minute to save Dudgeon and ruin Gen. Burgoyne's day.
* LesCollaborateurs: Rev. Parshotter is a Loyalist who tells the colonists to do as they're told.
* CombatPragmatist: Gen. Burgoyne. He is consistently shown to have a firm grasp of both the "big picture" and the countless details that keep an army fighting. He is also concerned about his [[Creator/NiccoloMachiavelli over-reliance on foreign mercenaries]].
* EasyEvangelism: Dudgeon is able to bring Judith and Anthony Anderson around to his viewpoint in record time.
* FromNobodyToNightmare: Rev. Anderson goes from being an anonymous provincial priest to the man who almost singlehandedly destroyed Gen. Burgoyne's American campaign.
* GrandInquisitorScene: Gen. Burgoyne doesn't want to hang Dudgeon, but it's his duty.
* HonorBeforeReason: Dudgeon switches places with Anderson to save him from being arrested by the British. Upon learning this, Anderson promptly sets out to return the favor (instead of using the chance to run for his life).
* HourglassPlot: Dudgeon and Anderson switch places to a great extent over the course of the play, and Anderson even wants to further this by giving his wife to Dudgeon and demanding that Dudgeon join the clergy.
* IAteWhat: Subverted in the film version. After eating a bowl of soup, General Burgoyne asks one of his men what was in it. Clearly expecting this reaction, the soldier admits that it was rattlesnake. General Burgoyne doesn't even miss a beat before pronouncing it delicious. [[spoiler:And he goes back for seconds.]]
* IWantMyBelovedToBeHappy: Anthony tries to do the noble thing and let Judith go off with Richard, but Richard knows the Andersons belong together, and in the end Anthony and Judith ride away.
* JustFollowingOrders: The attitude of most of the British officers, especially when they're hanging Dudgeon.
* LoveTriangle: One develops pretty rapidly between Anthony, Judith, and Richard.
* MeaningfulLook: In the 1959 film, there is a brief one between Anthony and Richard. As Richard is trying to thank Anthony for saving his life, Anthony gives him a wink over Judith's shoulder, as if to say that the whole "IWantMyBelovedToBeHappy" thing is just a ruse. Richard gives him a look back as if to say "You sly dog". From there on, it's pretty clear that Anthony will take Judith back, and that Richard will step aside.
* TheNeidermeyer: Major Swinden. General Burgoyne recognizes this and calls him on it.
-->'''Major Swinden''': Come what may, General, the British soldier will give a good account of himself.
-->'''General Burgoyne''': And therefore I suppose, sir, the British officer need not know his business; the British soldier will get him out of all his blunders with a bayonet? In future, sir, I must ask you to be a little less generous with the blood of your men, and a little more generous with your own brain.
* NiceToTheWaiter: Richard is the only person in his family who is kind to the family servant Essie. He comes across as better than the Andersons, who, while nicer to Essie, are also highly patronizing.
* OfficerAndAGentleman: General Burgoyne. His own troops have nicknamed him "Gentlemanly Johnny".
* PunchPunchPunchUhOh: A British officer breaks a chair over Anthony's back. Anthony gives him a surprised look. The officer punches Anthony in the face. Another look. Another punch, another look. Cue a look of utter terror from the officer, before Anthony punches him across the room.
* StopMotion: Used with puppets to provide some exposition over scene transitions in the 1959 film.
* TalkingIsAFreeAction: Especially obvious during the 1959 film. If General Burgoyne hadn't been such a stickler for protocol, Richard would have been dead long before Anthony finished negotiating with the General.
* TitleDrop: Richard calls himself "the devil's disciple".
* UnexpectedInheritance: Richard is surprised to learn that he has inherited the bulk of his father's estate (minus £50 to his younger brother), and that his mother was [[PassedOverInheritance passed over]].
* VeryLooselyBasedOnATrueStory: Played with by the closing narration in the 1959 film.
-->'''Narrator''': ...but that is a matter of history, on which it is impossible to rely. The rest of this story is pure fiction. You can safely believe every word of it.