Lol, you have no idea …

So, there used to be a writer’s guild rule (no idea if it still exists) that you weren’t paid full price if you re-used a script. However, if more than 10% of the script was changed, it was defined as a “new” script. And changing the names of the various characters involved counted toward that 10%.

So you get things like The Mod Squad episode ‘Cricket’ and the Charlie’s Angels episode ‘To Kill an Angel’ being pretty much identical because they changed the names in the script. (Both were Aaron Spelling productions, and I’d swear he also used it in one of his other programs, but I can’t remember which one - might’ve been either The Rookies or Starsky & Hutch? They kinda blend together after a while.)