Hogan's Heroes was a hit show on CBS, Batman a hit show on ABC. Somehow Klink ended up on Batman? Stranger things have NOT happened. I'd love to know the backstory on the inception and contract negotiations for this.
There were other Hogan's Heroes moments that skewed reality. See below. The cast of Hogan's Heroes on the Hollywood Palace TV show with Bing Crosby. They actually do a really good job with this. I'm sure there were quite a few confused kids (and parents) thinking, "Wait, I thought Hogan's Heroes was just pretend!"
The Cast of Hogan's Heroes On Hollywood Palace
Hogan and Schultz on the Red Skelton Show:
BUT THE BEST IS COLONEL KLINK (actually, Werner Klemperer this time)
GETTING A NEW MONOCLE ON THE PAT SAJAK SHOW
(skip to 1:36 to view the big event)
It's kind of sweet when he puts on the monocle and makes the "Klink" gesture.
Disclosure: During the writing of this article I learned how to spell monocle correctly.