Red Dwarf peaked around series 4/5 I think. After series 5 they started to wring the feck out of it and series 8 was just horrible. "Last of the Summer Wine" should be a warning to all comedy writers.
It's the old, old story - droid meets droid, droid becomes chameleon, droid loses chameleon, chameleon turns into blob, droid gets blob back again. Blob meets blob, blob goes off with blob and droid loses blob, chameleon and droid
How many times have we seen that story?