A great number of contrasts are found in this episode, with clever yet silly villains, simplistic and complicated ideas about identity and villainy and a moral dilemma placed in a traditional Doctor Who story.

Sci-fi of the past and sci-fi of the present battles each other to see which is more interesting in this episode. Also includes space and love.

This serial turns into a crime drama and our three critics don't mind it. The subject of comedy in Doctor Who is also discussed, it isn't necessarily a bad thing.

This episode is turned into a spy thriller, according to Nick, Ben and Luke, with a great soundscape and tense atmosphere, aided by great performances. It's winning them over.

Malcolm Hulke swings right off the bat with moral dilemmas the fight between an anarchic Doctor and authority continues and jokes about numbers. All in an airport. Ben, Nick and Luke enjoy this one.

Emotions run high and the end is nigh for the Macra and the Terror, but is this a happy ending? Luke, Nick and Ben tell it like it is.

Whilst this is a weak episode, its content remains worthy of discussion. Sharks, brainwashing, idioms and tense music are discussed by Ben, Nick and Luke. Speaking of idioms; here's one; "Subscribe now!"

Luke produces a thesis on why this episode is so good; the fear, the terror, the paranoia, the gas-lighting. Here's a story that Nick, Ben and Luke all attempt very hard to fault it and fail. This is good.

This curiously complicated episode draws many comparisons from Luke, Nick and Ben. Its themes of paranoia, culture and crabs are all intensely scrutinised, as are comparisons with episodes fifty years later.

Patrick Troughton's Doctor is rounding up as an all-powerful all knowing figure, as are the Cybermen into completely robotic automatons, a shadow of humanity. God and the Machine collide on the Moon. It ends abruptly. Luke, Ben and Nick chastise.