Our son is quite bemused by BOSS, the room-filling supercomputer. Can you blame him? I can remember that techno-phobia of the time all too well; it took my dad more than a decade to trust a top-loading VCR, so a computer wasn’t going to arrive in my family’s house for many, many years. So this seems really strange and silly to a kid who has been playing puzzle games on his tablet since he was really, really small. How can computers be evil? This isn’t one of the “great ones” for him because the maggots are gross and scary and now he’s worried about Cliff Jones, who’s been infected by a maggot, but at least it has explosions.
Captain Yates gets brainwashed by BOSS in this episode, and his mind freed by the Doctor, using the blue sapphire from Metebelis Three. Interestingly, this develops into important plot points in the next season. The Doctor doesn’t get brainwashed himself; he’s put up with far more advanced mind probes and the like than anything that even the top-of-the-line Earthlings can build. I think that the headset that he’s wearing also shows up in the next season along with the blue crystal and actor John Dearth, who is doing such a good job as the voice of BOSS.