Hogan impersonates Gestapo Colonel Hoganmeier.
The Underground uses a torn 7 of Spades playing card as a recognition code.
Hochstetter: You, raus!
Hogan: No, me Hogan.
Hogan: Schultz, you should know better than to go anywhere with that car in that condition.
Schultz: What's wrong with my condition?
Baker: Here's the assignment... double red.
Carter: Double red? That means they want this one done so fast we're already late with it!
Hogan: Lebeau, what condition is Klink's car in?
LeBeau: What kind of condition would you like it in?
Hogan: Just bad enough to go in for repairs overnight.
Carter: Isn't it about due for its thousand-mile checkup?
LeBeau: No, it just had one.
Carter: Well, set the speedometer ahead and give it another one.
Newkirk: No, we had to set the speedometer ahead for the last one. I think ol' Klink's getting suspicious.
Carter: May I suggest… brake failure?
Hogan: Brake failure sounds good.
LeBeau: It's logical, and the car hasn't had one good brake failure since the last collision.
Hogan: Brake failure it is. LeBeau, get to work. And make sure the brakes… don't.
This marked the only appearance from Yvonne Dardenne.
There are only two total credits from this actress.
This episode marks the third of three appearances by James B. Sikking.
This episode marks the third of three unrelated appearances by Buck Young.
This episode marks the sixth of six unrelated appearances by Jay Sheffield.
This episode marks the fifth of five unrelated appearances by Willard Sage.
This episode appears third on the VHS collection's "This Means War" volume.
This episode marks the seventh of seven unrelated appearances by John Crawford.
The Underground agent's moniker "Hercules" is an obvious allusion to the mythical greek god Heracles, son of Zeus and Alcmena. The Romans referred to this hero as Hercules.