So I'm probably in the minority, but I think Lovett should replace Llewellyn. I'm not saying get rid of Kryten entirely, just make him a much more minor character. The humour with his character in recent series has been so repetitious that much of the time it's pointless. Don't get me wrong, Llewellyn is very good, but his material hasn't been strong. We don't need the same jokes regarding sanitation brought up in every single episode. Hattie's Holly was never a "main character". She was a minor character, a supporting character. Llewellyn's Kryten took Norman's Holly's place in the series (this by the way is specifically mentioned in the S03 documentary "All Change" by Craig Charles). This was the problem with Norman in series 8 - he wanted to be a main character again, and have his original role. That would have worked much better than how he was actually used in the story - he was used instead as Hattie's Holly was, as a minor supporting character not essential to the plot. Norman's scene in S08E03 that starts in response to Rimmer's criticism with "if I'm so stupid, if I'm computer senile explain this then." and he reveals he got a separate set of nanobots to resurrect the crew is one of the funniest and best executed scenes in the whole of season 8. Exactly right. Holly's major purpose in Seasons 1 and 2 is to explain the episode's plot and setting. Lovett was able to bring an amazing comedic quality to this. From season 3 on that purpose was given to Kryten. So in most of seasons 3-5, and 8, Holly barely interacts with the plot. More to the point though, Lovett can write his own lines. He can improve the material he's given many times over. This is a quality most of the other dwarf actors, except perhaps Barrie, lack. His guest role in Keeping up Appearances S01E04 I think shows what a fantastic comedic actor he is, his lines are just delivered so well. "You know how it is, you forget things". Why should he share his role with another actor? None of the others have to. Norman was justifiably upset at them. They promised not to duplicate his character, to make Holly different, but Hattie just played the same Holly - his character - that's what made him angry. Llewellyn didn't duplicate David Ross's Kryten, he re-imagined the character. That's what Grant and Naylor and the producers assured Norman would be done with Holly. The other part of his dispute, which is why he quit season 3, was that he didn't want to do rehearsals because he had other acting commitments. That was negotiated but the producer cut his pay in-line with him working less. This by the way is talked about in one of the DVD extras (I can't remember which one, maybe "All Change") where the producer says that Norman's demands were reasonable and they could have compromised and if he had it to do over there's no way he would have let Norman quit over it. People have bashed Norman over the years, but the facts are the facts and the producer himself admitted they were the ones unreasonable with him. So yes he should absolutely be back, he's a better comedic actor than the rest of the dwarfers. And frankly the weakest actor in the past three series in my opinion has been Craig Charles. But short of re-casting Kris Marshall as Lister, it's an issue that has to be worked with.