When the Doctor mentions a ‘Klarj neon death voc bot’ he’s possibly discussing a version of the Voc robots known as ‘The Robots of Death’ who appeared in a story of that name in 1977.

A single, silver clad ‘Super Voc’ called SV7 is the boss robot. It’s also very likely ... To prevent Taren Capel’s voice being recognised, the Doctor uses helium gas to change Capel ...

In the first image below, the Doctor is standing in line with a team of humans, seemingly trading his usual stylish wardrobe for a set of military fatigues. Before him stands a large red robot ...