You're right of course. However, I think the intention is to suggest their technology has improved since the days of Tulloch Moor. I seem to remember a bit of handwaving about the humans being kept alive solely as an information source, rather than a body print. In both their nu-Who outings they've been shown to be able to morph even without the necessity of their human to be plugged into anything. Also it's worth bearing in mind that Broton and his crew were hiding in the Devil's Punchbowl for something like eight hundred years, after their homeworld was destroyed, so they probably missed a few updates.
The other Zygon wearing Osgood's face was "Bonnie" (perfect name for a boner, lousy name for a Zygon).
All in all I rather enjoyed the story. It wasn't without its faults, and some of the expository flashbacks got rather annoying, but on the whole I thought the good ideas outweighed the holes. Capaldi as usual was superb; the way he delivered that wonderful speech at the end was every previous Doctor at once.
One thing I'm not keen on is the Zygon actors faces so obviously being able to move around inside the costume. I know it's not exactly designed for ease of head movement, much like Batman's hat, but it just makes it painfully clear that it is a costume and throws me out of the drama.
The other Zygon wearing Osgood's face was "Bonnie" (perfect name for a boner, lousy name for a Zygon).
All in all I rather enjoyed the story. It wasn't without its faults, and some of the expository flashbacks got rather annoying, but on the whole I thought the good ideas outweighed the holes. Capaldi as usual was superb; the way he delivered that wonderful speech at the end was every previous Doctor at once.
One thing I'm not keen on is the Zygon actors faces so obviously being able to move around inside the costume. I know it's not exactly designed for ease of head movement, much like Batman's hat, but it just makes it painfully clear that it is a costume and throws me out of the drama.
At the age of five, Skagra decided emphatically that God did not exist. This revelation tends to make most people in the universe who have it react in one of two ways - with relief or with despair. Only Skagra responded to it by thinking, 'Wait a second. That means there's a situation vacant.'
