Star Trek: Enterprise, Series 4, Episode 22. First broadcast on Friday 13 May 2005.

This week Enterprise fans get the chance to watch their favourite show with Jonathan and Marina sitting next to them on the couch, which only raises enraging and bewildering questions like Is any of this even real? and Does any of this actually matter? (to which the answers are of course not and if you like, respectively). Meanwhile, Trip is forced to sacrifice himself to ensure that Archer gets the chance to participate in the foundation of the Federation, without which, to be honest, none of us would even be here. Probably.