Ep 3. Ouroborus

In the season 7 episode 3 of Red Dwarf titled "Ouroboros", the crew of the mining ship Red Dwarf discover a wrecked spaceship. They investigate and find it to be a research vessel from Earth, which has been missing for 200 years. The crew also discovers a time wand on board which allows them to travel back in time to different periods in the ship's past.

As the crew explores the ship's history, they come across several unexpected revelations, including the discovery of their own ancestors on board the ship. They also learn that one of the crew members on the research vessel is responsible for the extinction of all living creatures on Earth.

The crew members are forced to confront their own ancestry and their role in shaping the future of humanity. Meanwhile, Lister struggles with his own family tree and the impact it has on his self-image. The crew also contemplates the question of whether or not they should interfere with past events, knowing full well that any change they make could have a ripple effect on the present and future.

As the team continues to explore the past, they eventually arrive at a critical point where they must choose between altering the course of history or letting it unfold as it was meant to be. The decision they make will have far-reaching consequences that will impact their own lives and the fate of humanity.

The episode features the return of several key characters from the show's past, including Lister's ex-girlfriend Kochanski, who was stranded in another dimension in a previous season. It also features a number of humorous moments and pop culture references, including a spoof of the popular TV show Friends and a nod to the classic sci-fi film 2001: A Space Odyssey.

Overall, "Ouroboros" is a thought-provoking episode that explores the theme of time travel and its potential consequences. It also offers a unique perspective on the history of humanity and how individual actions can shape the course of events. Fans of the show will appreciate the return of familiar characters and the clever use of humor throughout the episode.