Huh, I thought it was explained in the show that he had to return home or back to military command and that there was some sort of prisoner swap thing.
So according to this article, Dixon chose to leave the show
Dixon decided to leave the popular sitcom, which was screened around the world, after 145 episodes and five series (1965-70), reportedly feeling that his talents weren’t being fully used.
So even a Fansite for Hogan’s Heroes with far too much details had no official reason for Kinchloe being gone from Stalag 13. The Fan Theory is he was transferred to another camp. In this way Klink’s perfect record was maintained.
His name on the show varied. At first, it was James; later, it was Ivan.
Wrong Thread
The above video is from 2014 and shows the wedding of the grand duke of Luxemborg. His bride was is a lovely woman, Stephanie de Lannoy, and when I saw part of the video I thought her father escorting her up the aisle was a handsome man, But that was her brother. At just past the 54:00 mark bride and groom greet an elderly man who has been helped up from his wheelchair. That’s the father, who is 91 and greeting his 28 year old daughter.
Big oops, this is supposed to be in another thread.
Similar to how Spearchucker* Jones disappears on MASH after a few episodes. I guess he was transferred?
*It’s from the book, movie, and show. This was a racist term, right? Because he was a quarterback and “those Africans throw spears” or something? I’ve always hated the nickname.
From the Book and made it to the Movie and then the Show.
The character was removed from the show for misinformation reasons. Apparently the staff of the show were told by authoritative sources that there were no Black Doctors serving in MASH units in Korea. So they wrote out the character to maintain historical accuracy. This information was later shown to be wrong.
No, it’s because he competed in javelin, according to the novel.
“Spear chucker” was a racist term long before the novel came out. Using the term for a Black guy who competed in javelin is part of the joke, but no one would have called him that if he hadn’t been Black.
But for the period it would be verisimilitude. Hell, even mid-70s it would have been thrown around (get it?) in real life.
Yeah, we get the point.
Say, you’re sharp.
It’s being reported that Mickey Kuhn passed away on Sunday. RIP.
Lisa Loring, the original Wednesday Addams has died. That leaves John Astin as the final cast member.
Crap! 
RIP, Lisa.
Jesus, I thought she’d be the last one standing. She had a pretty rough go of it for a number of years, and I’m sorry she died so young.
Who would have guessed that Gomez / Buddy would outlive Wednesday and Harry ?
RIP.
He is the last regular cast member of the Addams Family, even the kids are gone now.
From Night Court we lost Harry, Markie & Charles Robinson along with of course Selma and Florence and Mel Torme. Those 3 of the older cast members used their actual first names for the show. 
Only John Astin didn’t.
Then of course Harry shared his first name with his character but that was accidental. The character was already named Harry before casting Harry. Mac and Charles were both Robinsons of course.
Michael McKean is now the last of the Laverne & Shirley cast.
Ed Marinaro is still alive, though when I went to look it up, I see that he was only in 11 episodes (fewer than I had remembered) in Season 6, when they moved the show’s setting from Milwaukee to Los Angeles.
Yeah, I remember being quite surprised when I first learned that the character wasn’t written specifically for Harry Anderson.