The Blitzkrieg Button

The Blitzkrieg Button is the fourth episode of the first season of the television series Agent Carter.

Synopsis
Peggy may be in more trouble than usual when fugitive Howard Stark suddenly returns for mysterious reasons. And Chief Dooley chases a new clue all the way to Europe that threatens to destroy Peggy's future at the SSR.

Plot
Roger Dooley decides that he wants more information about Sasha Demidov and Leet Brannis and how they turned up alive after the Battle of Finow, so he goes to the Nuremberg Prison to see Nazi war criminal Colonel Ernst Mueller. There, Mueller is assigned to be hung, but Dooley convinces him to defy his captors and die on his own terms by taking a cyanide pill, after he gives Dooley the truth about what happened. Mueller tells Dooley that his regiment did not kill the Soviets; they found the men massacred upon arrival. Dooley leaves, giving Mueller a breath mint.

In New York City, Howard Stark has returned but he is being held for ransom by subordinates of Otto Mink. Peggy Carter and Edwin Jarvis stage a rescue, but when they attempt to get Stark to his penthouse, it is being watched by Agent Yauch. Carter decides instead to hide Stark in her room in the Griffith Hotel.

Stark does not make Carter comfortable by constantly going to other women's rooms, but eventually he reveals that he wants the Blitzkrieg Button, telling Carter that it is a devastating device. On her way to retrieve the Blitzkrieg Button, Carter realizes, because Jarvis doesn't lie without tugging his ear, that the Blitzkrieg Button is more than she is told. Carter opens the device to find a vial of Steve Rogers' blood.

Meanwhile, Jack Thompson is in charge of the New York Bell Company. He wants the other agents to follow his leadership, but Daniel Sousa has leads of his own he wants to follow. Sousa goes to the pier where The Heartbreak was to find a homeless veteran. He knows that the veteran knows something about what happened the night Ray Krzeminski died, but the veteran is uncooperative in his interrogation. With alcohol and a hamburger, Thompson gets him to talk; the woman who boarded the boat was not a blonde, as Sousa thought it was the same woman from La Martinique. Sousa stares at the picture of the woman until he decides to color the blonde hair black.

Carter is upset and hits Stark in the eye. Stark tells her that he was entrusted with one of the twelve samples of Rogers' blood and wanted to use it as a panacea to save the world. Carter knows he wanted the blood to make money and is ashamed that Stark would soil their lost friend's legacy like that. She decides that she has compromised herself for Stark for the last time. After killing his subordinates, Mink goes to the Griffith Hotel to assassinate Carter. Using guile to get Carter's apartment number from Miriam Fry, Mink approaches Carter's room when Dottie Underwood sees him. Mink threatens her with his Automatic Pistol; Underwood uses a series of acrobatic moves to kill Mink and obtain the gun for herself.

Carter hides the vial of blood in a wall in her room. Underwood admires the gun she has gotten.

Dooley returns to the Strategic Scientific Reserve and sees the Remote Typewriter writing a message.

Cast
Main Cast:
 * Hayley Atwell as Agent Peggy Carter
 * James D'Arcy as Edwin Jarvis
 * Chad Michael Murray as Agent Jack Thompson
 * Enver Gjokaj as Agent Daniel Sousa
 * Shea Whigham as Chief Roger Dooley

Guest Stars:
 * Lyndsy Fonseca as Angie Martinelli
 * Alexander Carroll as Agent Yauch
 * Dominic Cooper as Howard Stark
 * Bridget Regan as Dottie Underwood
 * Meagen Fay as Miriam Fry
 * Benita Robledo as Carol
 * Meagan Holder as Vera
 * Joanna Strapp as Gloria
 * John Bishop as Frank
 * Tim Dezarn as George
 * Billy Malone as Large Smuggler
 * Jeremy Timmins as Larger Smuggler
 * Chad Danshaw as Thug
 * Jack Conley as Colonel Ernst Mueller
 * Kevin Cotteleer as Alex Doobin
 * Gregory Sporleder as Otto Mink
 * Jim Palmer as Goon
 * Tim Garris as Hoodlum
 * Stan Lee as Man (next to Howard Stark)
 * Sarah Schreiber as Lorraine
 * Unknown actor as Agent Henry
 * Unknown actress as Helen

Locations

 * New York City, New York
 * New York Bell Company Office
 * Griffith Hotel
 * Howard Stark's Penthouse (mentioned)
 * Nuremberg, Germany
 * Nuremberg Prison
 * Finow, Germany (mentioned)
 * London, England (mentioned)
 * Rio de Janeiro, Brazil (mentioned)
 * Russia (mentioned)
 * Italy (mentioned)

Items

 * Blitzkrieg Button
 * Camera Pen
 * Remote Typewriter
 * Automatic Pistol
 * Shocker
 * Nitramene (mentioned)
 * Cyanide Pills (mentioned)

Vehicles

 * The Heartbreak (mentioned)

Events

 * Battle of Finow (mentioned)

Organizations

 * Strategic Scientific Reserve
 * United States Armed Forces
 * Soviet Armed Forces (mentioned)
 * German Armed Forces (mentioned)
 * Nazi Party (mentioned)

Mentioned

 * Project Rebirth
 * Steve Rogers
 * Leet Brannis
 * Sasha Demidov
 * Agent Ray Krzeminski
 * Anna Jarvis
 * Alice Shaw
 * General John McGinnis
 * Field Marshall Wilhelm Keitel

Trivia

 * The song played at the end of the episode is Drum Boogie by Gene Krupa.