A lot of people talk about XII (and in a way some of XI) rehashing old ideas. But what is forgotten is that both series are leading into the 30th anniversary. In recent interviews with Doug and the cast it was confirmed that especially series XII was meant as a lead into the anniversary, with Skipper as a semi anniversary special. Several TV shows have done so before; especially Doctor Who; which had many episodes with call backs with flashback heavy The Name of the Doctor leading into the Day of the Doctor special. I'm surprised Red Dwarf gets so much flack for doing so, as I think it's earned the right to celebrate it's past.