1. The original script had the show set in an American jail.

 

Series co-creator Albert S. Ruddy first set Hogan and his heroes in a domestic clink. He rewrote the script upon learning that NBC was developing a show titled Campo 44, which would be set in an Italian WWII prison camp. In an interview that appears on the Hogan's Heroes complete series DVD set, Ruddy claims that it took him just a day to rework the show into its WWII setting. Three years ago, Ruddy and Bernard Fein won the rights to the show back from billionaire basketball owner Mark Cuban. 

Image: The Everett Collection

2. Richard Dawson wanted his character to have a Liverpool accent.

 

The rakish British star originally auditioned for Hogan, but could not pull off a convincing enough American accent. Instead, he was cast as Cpl. Newkirk of the RAF. Dawson at first performed the role with a Liverpudlian accent, but was told by the network that nobody could understand him. Dawson switched to a Cockney dialect. When Beatlemania exploded in the States, Dawson jokingly told his bosses, "I told you so." 

3. Stalag 13 initially had an underground steam room.

 

With its network of tunnels and trap doors, Stalag 13 was certainly far-fetched. At first, it was even more fantastical. The prisoners had an underground steam room. It was removed for being deemed too outlandish. 

Image and model: Brian Williams / Flickr

4. The actors playing the four main German roles were Jewish.

 

Klemperer (Klink), Banner (Schultz), Leon Askin (Burkhalter) and Howard Caine (Hochstetter) were Jewish, and all but the latter had fled the Nazis during WWII. Additionally, Robert Clary, who played the cooking French corporal, LeBeau, had been interned at a concentration camp. Klemperer stated at the time, "I am an actor. If I can play Richard III, I can play a Nazi." The actor insisted that Hogan always won out over his captors. 

5. The show used the tagline "If you liked World War II, you'll love 'Hogan's Heroes'!"

 

The tagline was sarcastically suggested by comedian and author Stan Freberg in an interview with Bob Crane in The Sunday Times, on September 15, 1965. "Shall we say, 'If you liked World War II...you'll love Hogan's Heroes?'" Freberg dryly asks. "No, let's not say that, no," Crane responds. Nevertheless, it became the tagline. 

Image: AV Club

6. A 'Hogan's Heroes' album was released featuring cast members singing songs from WWII.

 

Clary, Dawson and costars Larry Hovis (Carter) and Ivan Dixon (Kinchloe) — pictured on the album cover — used the success of the series to showcase their singing talents. The four sang popular songs of the 1940s on this tie-in album. The liner notes on the back begin, "Would you believe World War II was funny?"

Image: Discogs

7. The theme song actually had lyrics.

 

The chirpy instrumental march that opened and closed each episode had secret lyrics. Robert Clary, Richard Dawson, Ivan Dixon and Larry Hovis formed a quartet of singing Heroes for the show's soundtrack.

Heroes, heroes, husky men of war,
Sons of all the heroes of the war before.
We're all heroes up to our ear-o's
You ask the questions
We make suggestions
That's what we're heroes for.

Check out all four verses here.

Image: The Everett Collection

8. The Mercedes touring car used on the show was one of three in existence.

 

General Burkalter, Klink's boss, would wheel up to the camp in the stylish Mercedes-Benz W31. Only 57 of the black and gray convertibles were constructed, and just three remained after the war — one belonged to the Spanish monarchy, another became a fire engine, and the last ended up in Hollywood. 

9. Klink was actually a trained violinist.

 

A recurring gag on the show was that Klink was a terrible violinist. In real life, Klemperer was quite accomplished on the instrument and the piano, as his father, Otto Klemperer, was one of the key conductors in 20th-century German classical music. 

10. The set was blown up during the making of 'Ilsa, She Wolf of the SS.'

 

What an ignominious fate. Hogan's Heroes was filmed on Desilu Productions' RKO Forty Acres backlot. In the making of the trashy 1974 exploitation film Ilsa, She Wolf of the SS, the set was destroyed for the final scene. Hogan's producers were okay with it, as it saved the cost of having the set demolished. 

11. In 1968, many of the principle cast members made a movie together, 'The Wicked Dreams of Paula Schultz.'

 

Crane, Klemperer, Banner and Askin teamed up for this big-screen rom-com about an East Germany pole vaulter. In his Kill Bill: Volume 2, Quentin Tarantino (undoubtedly a fan of Ilsa, She Wolf of the SS) has Uma Thurman buried alive in a grave marked Paula Schultz. 

12. The show was first aired in Germany in 1992 — and was called 'Barbed Wire and Heels.'

 

Yes, though it took a quarter century, the show did eventually air auf Deutsch. To make the show go over better, the dialogue was rewritten to make the Nazi characters even more inane. Klink was given an offscreen love interest, Kalinke, who is heard but never seen. The original German title Stacheldraht und Fersengeld (Barbed Wire and Heels) was eventually changed to Ein Käfig voller Helden (A Cage Full of Heroes).