Chameleon circuit

This is a list of items from the BBC television series Doctor Who, as well as its spin-offs Torchwood and The Sarah Jane Adventures.

Pronounced /ˈtuːdɪs/, the Twelfth Doctor used this device to emulate the ability of the boneless to flatten 3D objects and return the flattened objects to their original state in the episode "Flatline".

The Tenth Doctor used red blue anaglyphic 3D lenses to examine the Void ship and the "ghosts" in "Army of Ghosts". The glasses enable the wearer to see the "Void Stuff", background radiation from the Void which surrounds and infuses an object or person that has travelled through the void.

The Doctor couldn't help but joke that with the glasses on, it was the first time Jackie Tyler looked normal to him; everyone else had Void Stuff on them. The Twelfth Doctor used them in the comic story "The Fractures", once more to see Void stuff.

An item of unexplained function in the Fourth Doctor's tool kit. In the serial "The Invasion of Time" Rodan requests it from him while modifying the TARDIS console to allow Gallifrey's planetary shields to be controlled from there.

A red coloured liquid used to clog machinery or gears - "if it moves, it doesn't" the Doctor would explain. The Tenth Doctor uses a wine glass full of multi-grade anti-oil to immobilise the clockwork androids in "The Girl in the Fireplace".

A blue liquid that the Ninth Doctor carries as a weapon against the living plastic body of the Nestene Consciousness in "Rose". It appears to break down plastics chemically, without any effect on other materials.

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