I think the tone of the show has certainly changed over the years, because it's really, really hard to do something different when you have a show going on as long as this has.
“Boss, life is trouble. Only death is not. To be alive is to undo your belt and look for trouble.”
“I am convinced that people with such wounds will be quite ready to co-operate in a safe and painless experiment in the interests of humanity as a whole.”