
Twenty‑three years after his college football heroics, mild‑mannered bookkeeper Harold Diddlebock is abruptly fired by his pompous boss, advertising magnate J.E. Wagglebury, and left with a meager pension. With nothing to lose, he begins drinking wildly with a new friend, spiraling into reckless antics that turn his ordinary Wednesday into an unforgettable, chaotic adventure.
Does The Sin of Harold Diddlebock have end credit scenes?
No!
The Sin of Harold Diddlebock does not have end credit scenes. You can leave when the credits roll.
See current US streaming, rental, and purchase options for The Sin of Harold Diddlebock (1947) via JustWatch.
Explore the complete cast of The Sin of Harold Diddlebock, including both lead and supporting actors. Learn who plays each character, discover their past roles and achievements, and find out what makes this ensemble cast stand out in the world of film and television.

Lionel Stander
Max

Margaret Hamilton
Flora

Edgar Kennedy
Jake the Bartender

Torben Meyer
Barber with Mustache

Rudy Vallee
Lynn Sargent

Franklin Pangborn
Formfit Franklin

Robert Greig
Algernon McNiff

Arthur Hoyt
J.P. Blackstone

Al Bridge
Wild Bill Hickock

Julius Tannen
Nearsighted Banker

Victor Potel
Prof. Potelle

J. Farrell MacDonald
Desk Sergeant (uncredited)

Harold Lloyd
Harold Diddlebock

Tom McGuire
Police Captain (uncredited)

Robert Dudley
Robert McDuffy

Charles R. Moore
Bootblack (uncredited)

Jack Norton
James R. Smoke

Dewey Robinson
Lucky Leopold (uncredited)

Frank Moran
Mike the Cop (uncredited)

Georgia Caine
Bearded Lady

Jimmy Conlin
Wormy

Raymond Walburn
E.J. Waggleberry

Arline Judge
Manicurist

Frances Ramsden
Frances Otis
Discover where to watch The Sin of Harold Diddlebock online, including streaming platforms, rental options, and official sources. Compare reviews, ratings, and in-depth movie information across sites like IMDb, TMDb, Wikipedia or JustWatch.
Challenge your knowledge of The Sin of Harold Diddlebock with this fun and interactive movie quiz. Test yourself on key plot points, iconic characters, hidden details, and memorable moments to see how well you really know the film.
Which actor portrays the title character Harold Diddlebock?
Read the complete plot summary of The Sin of Harold Diddlebock, including all major events, twists, and the full ending explained in detail. Explore key characters, themes, hidden meanings, and everything you need to understand the story from beginning to end.
In 1923, Tate College freshman Harold Diddlebock Harold Lloyd is brought into his college’s football team where he scores the winning touchdown, instantly catching the eye of the pompous advertising magnate J.E. Waggleberry. Although Harold dreams of becoming an “ideas man,” Waggleberry assigns him to a lowly bookkeeping position, setting a tone of unintended consequence that will echo through the years.
In 1945, the now middle-aged Harold is let go by Waggleberry for old age and not being an ideas-man. He is given an 18 karat Swiss watch and a severance check for $2,946.12, the remains of his company investment plan. He bids farewell to Miss Otis, a young woman who works at an artist’s desk down the aisle, giving her the paid-for engagement ring that he had, having planned to marry each of her six older sisters (Hortense, Irma, Harriet, Margie, Claire, and Rosemary) when they had worked there before her. He wanders out, aimlessly through the streets, his life’s savings in his trouser pocket.
Harold is approached by Wormy, a local con artist, petty gambler, and racetrack tout, who asks Harold for some money so he can place a bet. Jimmy Conlin as Wormy sees the large amount of cash that Harold has, and hoping to get him drunk enough to acquire some of the cash, takes Harold to a local bar for a drink. When Harold tells the bartender, Jake, that he has never had a drink in his life, the barkeep creates a potent cocktail he calls The Diddlebock. The effects of the alcohol cause Harold to yowl uncontrollably. Gazing at himself in the bar mirror, Harold suddenly declares himself a loser and races out to remake himself. Soon Harold is getting his hair cut and his nails manicured at a local tailor shop and salon, and is trying on a gaudy plaid suit supplied by Formfit Franklin Franklin Pangborn.
In the midst of his transformation, Harold overhears Wormy talking with his bookie Max Lionel Stander, and impulsively bets $1,000 of his money on a 15-to-one long shot horse named Emmaline. To everyone’s surprise, Emmaline wins, and the now-rich Harold celebrates all around town on a day-and-a-half binge of spending, gambling, and carousing.
Days later, Harold wakes up on the sofa inside the house of his widowed sister Flora. She chastises him for his behavior. He is hungover, and finds he has a garish new wardrobe and a ten-gallon cowboy hat. Unable to remember much about his drunken binge, Harold goes to return the plaid suit and is surprised to learn that he now owns a horse-drawn cab, complete with an English driver named Thomas.
A worried Wormy then rushes up and informs Harold that, with winnings from a second bet, Harold also bought a bankrupt circus. Harold and Wormy visit the circus-loving Wall Street banker Lynn Sargent, but he turns them down because he is trying to unload his own bankrupt circus. When the rest of the town’s bankers follow suit, Harold comes up with an idea. To get past the bank guards, Harold dresses up in his plaid suit and brings along Jackie, a tame circus lion, who incites panic. Carrying a filled Thermos, Wormy gives shot drinks of the potent Diddlebock cocktail to each of the bankers they visit so their inhibitions will fade and convince them to put in bids for ownership of the circus.
Harold, Wormy, and Jackie the Lion are arrested and thrown in jail. Miss Otis bails them out the following day. They find that the publicity has attracted a mob of bankers at the jail who want to buy the circus – but Ringling Brothers outbids them. Harold celebrates with another Diddlebock, and again has another relapse. Harold wakes up days later in the horse-drawn cab with Miss Otis, where he learns that he received $175,000 for the sale of the circus, he is now an executive at Waggleberry’s advertising agency, and that he and Miss Otis are married. Reassuring Harold that she truly loves him, Miss Otis gives him a big kiss.

Coming soon on iOS and Android
From blockbusters to hidden gems — dive into movie stories anytime, anywhere. Save your favorites, discover plots faster, and never miss a twist again.
Sign up to be the first to know when we launch. Your email stays private — always.
Explore the mobile appWatch official trailers, exclusive clips, cast interviews, and behind-the-scenes footage from The Sin of Harold Diddlebock. Dive deeper into the making of the film, its standout moments, and key production insights.
Discover the central themes, ideas, and keywords that define the movie’s story, tone, and message. Analyze the film’s deeper meanings, genre influences, and recurring concepts.
Dive into our Movie Wiki for in-depth film encyclopedia entries, including cast biographies, production trivia, plot synopses, behind-the-scenes facts, and thematic analyses. Whether you’re researching iconic directors, exploring genre histories, or discovering hidden easter eggs, our expertly curated movie database has everything you need to fuel your cinematic passion.
Browse a curated list of movies similar in genre, tone, characters, or story structure. Discover new titles like the one you're watching, perfect for fans of related plots, vibes, or cinematic styles.
What's After the Movie?
Not sure whether to stay after the credits? Find out!
Check out our other apps:
SAT Sphere
Build confidence for the Digital SAT.
Mori Atlas
Discover wild places worth protecting.
Luntero
Search smarter for a home in Amsterdam.
Plot Explained
Unravel movie endings and hidden clues.
Pokechamp
Dive into Pokémon data and battle logic.
Driving Theory
Get ready for your European theory test.
Movie Dust
Plan your next cinema trip with ease.
Musemap
Find art and culture as you travel.
Selkobase
Compare credentials before committing.
Local Manual
Turn an unfamiliar country into practical next steps.
Lernavi
Compare school systems before your next move.
GymRoam
Find a workout stop wherever your plans take you.
Explore Our Movie Platform
New Movie Releases (2026)
Famous Movie Actors
Top Film Production Studios
Movie Plot Summaries & Endings
Major Movie Awards & Winners
Best Concert Films & Music Documentaries
Movie Collections and Curated Lists
© 2026 What's After the Movie. All rights reserved.
Privacy Policy