It Got By The Censor/In Jokes

[ZelenskyTheValiant (Ivan)]

I always loved Don Rickles. I always dug his insult humor. It never seemed mean-spirited to me. That was just his personal schtick and no one did it better than Don!

[Luther's nephew Dobie]

1) In 1972's The Godfather directed by Francis Ford Coppola, whenever oranges are in a scene, it means someone is about to be murdered or sold out, either by his closest people or those in the room.

2) Taking a page from Alfred Hitchcock who famously appeared in the background at the start of his movies - once in a newspaper ad a character was reading - Martin Scorsese opted to do the same.
In 1976's Taxi Driver, he appears in a sidewalk scene as Cybill Shepherd strides by. Later on as a fare in the cab he spots his wife cheating on him when he spots her silhouetted image in a glass window.

3) In 1956's The Searchers, director John Ford had constantly belittled actor Ward Bond's enormous rear on the set. After Bond objected, Ford gratuitously featured said rear in many shots.
Culminating near the end where Pat Wayne's(Duke's son) cherry second Lt. character has accidentally stabbed Ward in the rear with his sword. Ford then showing Bond bent over as his
wound is administered to.

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Mad Dog Morgan (Dir. Philippe Mora, 1976)
Supt. Cobham: “By all means, off with his head… and don’t forget the scrotum.”

[Luther's nephew Dobie]

In the "Bupkis" episode(March 10, 1965)of the Dick Van Dyke Show, Rob reminisces with an old army buddy about the camp shows they put on.
Rob then sings two of the silly songs he wrote back then, "Attila the Hun" and "Guns of Navarone".

Fast forward two years to March 30, 1967 and the That Girl episode "Author, Author". Marlo Thomas's boyfriend Don composes and then sings two silly songs for her for her audition - 
"Attila the Hun" and "Guns of Navarone".

Not exactly plagiarism, more a case of writers recycling material and getting paid twice as both episodes were written by Bill Persky and Sam Denoff.
Legendary producer/writer (Maverick/Rockford Files) Roy Huggins was a master of that, scripts/scenes and characters he had done earlier, such as for The Virginian,
repeatedly turned up on his Alias Smith and Jones series, hardly changed a whit.
As well, Rockford File's Lance White(Tom Selleck) was a 100% take on Maverick's Waco Williams, as Huggin's admitted.
Huggins bore a life long grudge against the studios for the artful way they - especially Warner  Brothers -  cheated him out of "created by" and or writing royalties and if he could
take liberties himself, he was just getting a little back of his own.

By the way other writers would name characters after the aforementioned  Bill Persky, such as Sgt. Carter's pal Sgt. Persky on Gomer Pyle, USMC.

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One time Magnum guest star Richard Roundtree -
"It's my duty, to please the booty."
John Shaft

[Luther's nephew Dobie]

In the Bupkis episode(March 10, 1965)of the Dick Van Dyke Show, Rob reminisces with an old army buddy about the camp shows they put on.
Rob then sings two of the silly songs he wrote back then, "Attila the Hun" and "Guns of Navarone".

Fast forward two years to March 30, 1967 and the That Girl episode "Author, Author". Marlo Thomas's boyfriend Don writes and then sings 
two silly songs for her for her audition -  "Attila the Hun" and "Guns of Navarone".

Not exactly a case of plagiarism, but of writers recycling material and getting paid twice as both episodes were written by Bill Persky and Sam Denoff.
Legendary producer/writer  (Maverick/Rockford Files) Roy Huggins was a master of that, scripts - and characters - he had done earlier such as  for
The Virginian repeatedly turned up on his Alias Smith and Jones series, the stories/characters hardly changed.
Huggins bore a life long grudge against the studios for the artful way they  - especially Warner  Brothers -  cheated him out of "created by" and or
writing royalties and if he took liberties himself, he was just getting a little back of his own.

By the way other writers would name characters after the aforementioned  Bill Persky, such as Sgt. Carter's pal Sgt. Persky on Gomer Pyle, USMC. 
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Danny Thomas Show Season 11 Episode 10 (12-9-63), "The Hex".

Handyman Charles Lane explains to Danny Thomas why he won't buy from the local lumberyard as -

"Aaron Rubin runs that...in 1923 Aaron Rubin left my cousin waiting at the church."

Aaron Rubin was a director/producer for The Andy Griffith Show, Gomer Pyle and other series at the same studio where the Danny
Thomas Show was filmed, Desilu.

The Danny Thomas Show Season 9 Episode 12 (12-25-61) "Teacher fora Day".
Stand in teacher Danny calls on student in class, asks her name, she replies "Veronica".
She is the real life older sister of series regular Angela Cartwright, who also starred in Lost in Space.