Star Trek 'superfans' in London
21 October 2012 Last updated at 00:10 BST
For the first time in Europe, all five Star Trek captains have gathered for a convention.
William Shatner joined Sir Patrick Stewart, Avery Brooks, Kate Mulgrew and Scott Bakula at Destination Star Trek in London.
BBC News went to meet William Shatner and some of the biggest fans at the event.
Video journalist: Rachel Curtis