In this episode Mark discusses one his favourite science fiction story types and themes in films, in TV shows, and in literature: time travel. Mark discusses some of his favourite depictions of Time Travel in entertainment - from the 'Bill & Ted' films, to the 'Back to the Future' trilogy, to 'Doctor Who', to 'Quantum Leap' - whose stories revolve around "time travelers" and "time machines" traveling into the future or to the past. Mark talks about the potential of there one day being real life "time tourists" and the potential paradoxes that might ensue as a result. And Mark also recites his poems "The Time Traveller" and "Be Excellent To One Another".
