I certainly think the intention of Duct Soup (other than to hastily replace the Cat episode) was to try and do something really character based like Marooned (although the DVD reveals that the primary reason for doing marooned was that "snow looks good") but I don't think it pulled it off. Chloe Annett's Kochanski just isn't funny and is actually irritating in the extreme (and not in a lovable rimmer way). That pretty much kills the episode for me in the way it pretty much killed the rest of the series. I also found Lister's change from hopeless romantic dreamer to borderline creepy stalker to be quite revolting. I also liked Beyond a Joke at the time as it felt more Dwarfy (although I know its generally hated). Sadly, it's the beginning of a worrying trend of not even bothering to explain things in Red Dwarf that bugs me (in this instance where do the Gelf suits come from).