In 2013, two missing stories were recovered by a missing films hunter called Phil Morris; one was complete, the other missing only one episode out of six. The complete one was Enemy of the World, a story featuring Patrick Troughton playing two characters: the Doctor himself and a ruthless dictator called Salamander.

The plot is a relatively simple one. The Doctor and his companions Jamie and Victoria arrive in the near future (2018), where the Doctor is mistaken for Salamander by a group of spies and is persuaded to use his uncanny resemblance to bring him down before he causes the end of the world through creating natural disasters. The first thing to note is this doesn't feel like a Doctor Who story; it is a strange entity as it feels more like a spy thriller. Salamander is more 'Bond villain' than one who usually appears in the show. Also, the story has a surprisingly dark ending where the TARDIS doors are opened and Salamander falls out into the time vortex.  It's a nice break from the usual but it never feels quite as engaging as a typical Doctor Who story.

The best thing to watch this serial for is Patrick Troughton in his dual role. Patrick Troughton does a fantastic job as both his incarnation of the Doctor and Salamander; it's amazing how he manages to make both characters different from each other even though he is having to juggle playing both. He slips effortlessly back into playing the Doctor after taking a turn at Salamander and vice versa. It feels like watching two different actors rather than just one; I think it is a shame the new series didn't attempt this in series 9 by having an episode set in Pompeii so Peter Capaldi could play both the Doctor and Caelicius because it would be interesting to see how the new series would handle it.

The settings and production work are also great.  The production values here are excellent. The serial feels expensive, especially with location filming on a beach and the stuff with the lift that goes underground to the people who believe a nuclear war has devastated the Earth. Everything feels like it cost more than other serials at the time and alongside that you can tell the production crew put in a lot of work.

Overall, The Enemy of the World isn't quite as engaging as your average Doctor Who story but it's still a recommended watch due to Patrick Troughton's fantastic dual performance and the impressively high production values. There is even a helicopter.