"Halt, Who goes there?"

Throughout the series, Sergeant Schultz issued 6 sentry challenges to Colonel Hogan.

1. "The Prince from the Phone Company" (1.26)
   • Hogan's Response: Rudolf Hess
2. "The Schultz Brigade" (2.2)
   • Hogan's Response: Oliver Twist
3. "The General Swap" (2.17)
   • Hogan's Response: Axis Sally
4. "Praise the Führer and Pass the Ammunition" (2.19)
   • Hogan's Response: The Kaiser
5. "Is there a Doctor in the House (3.18)
   • Hogan's Response: Heinrich Himmler (LeBeau), Josef Goebbels (Kinch) and I’m Herman Goering
6. "Get Fit or Go Fight" (5.16)
   • Hogan's Response: The Kaiser

Additionally, Schultz playfully asked the barmaid Maria in "Clearance Sale at the Black Market" what the password was to allow her to walk by. Her response was, “Maria loves Teddy Bear”