Double trouble for the Doctor and pals in this 28th episode of I’ll Explain Later. Troughton meets his match - literally - in recently discovered deadly doppelgänger demagoguery thriller The Enemy of the World. Frozen in lifeless, arid suspension...or dying of cold in the Tardis? Karen Gillan must act, fast, to make Amy’s Choice. And a Fourth Doctor copyist needles the Tigellans into showing him their dodecahedron in sci-fi horticulture favourite Meglos. Along the way, John vamps it up, Matt likes his chefs sarcastic and Jim wonders if we’re still recording.