Transylvanian Homesick Blues - S2-E65
Character mistake: Ray says that it's the very first time they've dealt with vampires. In Season 2 Episode 25, "No One Comes to Lupusville", the Ghostbusters had to deal with both werewolves and vampires.
The Real Ghostbusters (1986)
Episode list - season 5
Starring: Frank Welker, Maurice LaMarche, Arsenio Hall, Lorenzo Music
More mistakes in The Real Ghostbusters
Egon Spengler: Notice the vacant stare, the completely mindless look. That could only mean one thing.
Winston Zeddemore (I): She's from California?
Egon Spengler: No. She's been hypnotized.
Janine, You've Changed - S6-E1
Trivia: This episode was written by series story-editor J. Michael Straczynski as an inside joke and meta swipe against the network and consulting firm Q5 for forcing them to soften the character of Janine after the first batch of episodes. Their mandate infuriated all the writers, who preferred the original cynical, snappy Janine. Straczynski making Janine's changes the result of an evil entity reportedly infuriated the network and Q5, who realised that he was essentially calling THEM evil.
Question: Excluding Maurice LaMarche, why were the voice actors for Ray, Winston, Peter, and Janine replaced in later seasons?