Doctor Who Series 13 Cast: Game Of Thrones’ Grey Worm Actor To Play Action Hero ‘Vinder’ By Louisa Mellor Visual Effect - Mat Irvine meets up with his old colleague Ian Scoones at Bray Studios to talk about the visual effects for The Invisible Enemy

The Doctor suggests a "kind of St. Elmo's fire" is responsible for the halo of light that momentarily surrounds him.

Broadcasts

Working titles for this story included The Enemy Within, [1] The Invader Within and The Invisible Invader. [ citation needed] It was not decided until late in the production that K9 was to be a new companion. The decision to use it in multiple serials was made partly to offset the expense that had gone into making the prop. [ citation needed] There are a few possible alternatives. Firstly: something brand new that’s impossible to predict (e.g. Skithra revenge fleets, the Master and the Cyber Lords get melded together, an evil version of W.A.S.P from Stingray). It’s probably going to be that really isn’t it? When the Doctor points a gun at Leela, why does she crouch down on the spot rather than nipping round the corner?

The Doctor eventually collapses as a result of his infection, but first manages to relay to Leela the coordinates of a local hospital asteroid. At the Bi-Al Foundation, based on the asteroid, Professor Marius clones the two time travellers, miniaturises the clones using the relative dimensional stabiliser from the TARDIS and then injects them into the Doctor's body in the hope that they can find and destroy the nucleus. When K9 shoots one of the infected men, the blast beam appears to come out of his eyes, then moves down to his snout as the camera moves.The Invisible Enemy was the second serial of season 15 of Doctor Who. It saw the first appearance of K9. Detect Evil: Leela can "sense" the evil of the coming story so strongly that she chews on the Doctor's scarf for comfort and forcibly prevents the Doctor from opening the TARDIS doors. Naturally, he ignores her. Mega-Microbes: The miniaturized clones of Leela and the Doctor confront the virus inside the real Doctor's brain. Later, the virus is taken out of the Doctor and enlarged to human scale. When the Doctor is congratulating himself on blowing up the Swarm, the shadow of a boom mike can be seen. This story featured more extensive model work than any previous Doctor Who story. ( INFO: The Invisible Enemy)