The senile artificial intelligence Holly is able to be stored on a form of wrist-watch, although he has become wary of people who scratch their armpits or who have holes in their pockets. Holly can been transferred back and forth from the mainframe of Red Dwarf. Lister's Holly Watch was first seen in Series II, whenever the crew were away from their own ship or time (i.e. Stasis Leak, Parallel Universe) so that Holly could continue to communicate with the crew. Holly could also go mobile in the form if the Holly Robot.