"KARLOFF PETRIFIES THEM!"
A gang of criminals, which includes a piano player and an imposing former convict known as 'Gruesome', has found out about a scientist's secret formula for a gas that temporarily paralyzes anyone who breathes it. When Gruesome accidentally inhales some of the gas and passes out, the police think he is dead and take him to the morgue, where he later revives and escapes. This puzzling incident attracts the interest of Dick Tracy, and when the criminals later use the gas to rob a bank, Tracy realizes that he must devote his entire attention to stopping them.
Gruesome

Dick Tracy

Tess Trueheart

Dr. L.E. Thal

Dr. I.M. "Irma" Learned

Pat Patton

Melody

X-Ray

Dan Sterne

Chief Brandon

Dr. A. Tomic

Waiter at Hangman's Knot (uncredited)

Sneezing Bank Customer (uncredited)

Bar Patron (uncredited)
City Hospital Driver (uncredited)

Bank Customer (uncredited)

Sergeant (uncredited)

Fred (Police Analyst) (uncredited)

Stone (Bank Teller) (uncredited)

Blonde Bank Customer (uncredited)

Pop (uncredited)

Luke (Police Stooge) (uncredited)
Humphrey (Bank Guard) (uncredited)

Dr. Frankey (uncredited)

Owner of the Hangman's Knot (uncredited)

Doctor (uncredited)
Officer Carney (uncredited)

Police Driver in Montage (uncredited)

Police Sgt. in Montage (uncredited)
Detective (uncredited)

Insolvent Borrower (uncredited)

Crandall (uncredited)

Bank Officer (uncredited)

Tim (uncredited)

Policeman (uncredited)