First Contact: ‘Conundrum’ Season 5 Episode 14

The crew of the Enterprise have lost their memories but still remember how to push all the buttons. Using the ship’s systems, they find their personnel files and their mission. The Federation is at war and they’re on their way to attack a big space station and they can’t communicate with Starfleet or risk giving away their position, which is mighty inconvenient. Upon scanning their enemy, it appears that they are nowhere near as advanced as the Enterprise. Picard starts to have doubts about blowing them up with a photon torpedo but first officer Kieran McDuff encourages him to fight on. Meanwhile, Riker, Troi and Ro get involved in a 1970s sex comedy.