Who Done It? (1942) — AI Story Visualization

Plot Analysis Summary

An aspiring radio writer becomes an amateur detective when a live mystery broadcast turns into a real murder investigation.

Story Structure — 5 Plot Phases

Ambition Meets Murder

Chick works at a radio station while hoping to write mystery programs. During a live broadcast, the network president is electrocuted, turning professional ambition into an investigation.

Key Events

• Radio Station Soda Counter — Chick works at the station soda counter while aspiring to write radio mysteries. Characters: Chick Larkin Location: Local radio station headquarters
• Writing Ambition — Chick hopes to become a writer for a radio mystery show. Characters: Chick Larkin Location: Local radio station headquarters
• Mystery Broadcast Gathering — Chick and Jane attend a broadcast of a radio mystery program. Characters: Chick Larkin, Jane Little Location: Radio station studio
• Broadcast Begins — The live mystery program begins inside the station. Characters: Chick Larkin, Jane Little Location: Radio station studio
• Electrocution Discovery — The network president is mysteriously electrocuted as the broadcast begins. Characters: Chick Larkin, Jane Little Location: Radio station headquarters

The Studio Turns Hostile

Chick impersonates a detective and investigates the station after the first killing. Suspicion from the real detectives and the discovery of a second body create a dangerous chase.

Key Events

• Amateur Detective Plan — Chick impersonates a detective to investigate the killing. Characters: Chick Larkin Location: Radio station studio
• Station Investigation — Chick investigates inside the station while Jane participates in the wider inquiry. Characters: Chick Larkin, Jane Little Location: Radio station headquarters
• Detective Suspicion — Real detectives treat Chick and his associate as prime suspects. Characters: Chick Larkin Location: Radio station studio
• Studio Chase — A prolonged chase spreads throughout the studio. Characters: Chick Larkin Location: Radio station studio
• Second Body Found — The body of the network president's physician is discovered. Characters: Chick Larkin, Jane Little Location: Radio station headquarters
• Flight From Studio — Chick and his associate flee the studio after the investigation intensifies. Characters: Chick Larkin Location: Outside the radio station

The Prize Trap

After fleeing, Chick hears an unexpected radio announcement about a ten-thousand-dollar prize. Returning to claim it leads to his arrest, while Jane helps advance a plan to recreate the murder broadcast.

Key Events

• Flight From Studio — Chick and his associate flee the studio after the investigation intensifies. Characters: Chick Larkin Location: Outside the radio station
• Unexpected Prize Announcement — They hear a radio announcement that one of them has won ten thousand dollars. Characters: Chick Larkin Location: Outside the radio station
• Prize Claim Attempt — Chick and his associate return to the station to claim the announced prize. Characters: Chick Larkin Location: Radio station headquarters
• Amateur Arrest — The real detectives arrest Chick and his associate instead of awarding the prize. Characters: Chick Larkin Location: Radio station headquarters
• Reenactment Proposal — Jane helps persuade the group to reenact the broadcast connected to the murders. Characters: Jane Little Location: Radio station studio

Transmission Revealed

The radio program is reenacted to make the murderer expose himself. The investigation reveals that the station was used for illegal transmissions and that the murders were meant to conceal them.

Key Events

• Murder Broadcast Recreated — The group recreates the program in hopes that the murderer will reveal himself. Characters: Chick Larkin, Jane Little Location: Radio station studio
• Illegal Transmission Motive — The reenactment reveals that the murderer used the station for illegal transmissions. Characters: Chick Larkin, Jane Little Location: Radio station studio
• Murderer Flees Upstairs — The murderer loses his nerve and flees toward the roof. Characters: Chick Larkin Location: Radio station roof access

Help From The Roof

The murderer flees to the roof and is pursued by Chick. A slingshot changes the illuminated sign into a plea for help, allowing the police to arrive and make the arrest.

Key Events

• Murderer Flees Upstairs — The murderer loses his nerve and flees toward the roof. Characters: Chick Larkin Location: Radio station roof access
• Roof Pursuit — Chick pursues the fleeing murderer onto the roof. Characters: Chick Larkin Location: Radio station roof
• Roof Struggle — Chick and his associate struggle with the murderer on the roof. Characters: Chick Larkin Location: Radio station roof
• Sign Letters Broken — A slingshot breaks the bulbs spelling the station sign's original name. Characters: Chick Larkin Location: Radio station roof
• Send Help Sign — The damaged sign now reads "SEND HELP," signaling the emergency. Characters: Chick Larkin Location: Radio station roof
• Police Arrest — The police arrive and arrest the murderer after the rooftop struggle. Characters: Chick Larkin, Jane Little Location: Radio station roof

Story Breakdown

• Radio Station Dreams — Chick's ordinary station job is contrasted with his ambition to write radio mysteries.
  • Soda Counter Work — Chick works at the soda counter of the local radio station headquarters.
  • Writer Ambition — Chick hopes to become a writer for a radio mystery show.
• Broadcast Murder — A live mystery program is interrupted by the network president's unexplained death.
  • Studio Gathering — Chick and Jane attend the station's mystery broadcast.
  • Electrocution Discovery — The network president is mysteriously electrocuted as the show begins.
• Amateur Investigation — Chick adopts a detective identity and searches for answers inside the station.
  • Detective Impersonation — Chick impersonates a detective to investigate the murder.
  • Studio Pursuit — Real detectives suspect the amateur investigators and a chase follows.
• Second Murder — The discovery of another body deepens the mystery and increases the danger.
  • Physician Found — The body of the network president's personal physician is discovered.
  • Desperate Escape — Chick and his associate flee the studio after the investigation escalates.
• Prize And Arrest — A surprising radio prize announcement lures Chick back to the station, where the police arrest him.
  • Ten Thousand Dollars — Chick hears that his associate has apparently won a ten-thousand-dollar radio prize.
  • Return To Station — The attempt to claim the prize ends with arrest by the real detectives.
• Reenactment Trap — Jane helps promote a recreated broadcast designed to make the murderer reveal himself.
  • Broadcast Recreated — The program connected to the murders is performed again.
  • Hidden Transmission — The murderer is exposed as someone using the station for illegal radio transmissions.
• Rooftop Pursuit — The exposed murderer flees upward, leading to a physical confrontation and an improvised signal for help.
  • Roof Struggle — Chick pursues the murderer and struggles with him on the roof.
  • Emergency Sign — A slingshot breaks the sign's bulbs so that it reads "SEND HELP."
• Justice Arrives — The emergency signal brings the police, ending the murder investigation.
  • Police Response — The police arrive at the station roof after the signal appears.
  • Murderer Arrested — The murderer is arrested after the rooftop confrontation.

Directed by

Erle C. Kenton

Key Cast

• Bud Abbott — Chick Larkin
• Lou Costello — Mervin Q. Milgrim
• Patric Knowles — Jim Turner
• Louise Allbritton — Jane Little
• Mary Wickes — Juliet Collins