Doctor Who: 10 Behind The Scenes Bust-Ups BBC Doesn't Want You To Know

The Eleventh Doctor story The Power Of Three is one of the better scripts written by current showrunner Chris Chibnall, but the episode isn't perfect, because it completely falls flat in its final stretch.

A promising build-up involving an invasion of black cubes leads to an abrupt conclusion in which the mastermind behind said invasion - the Shakri - just vanishes, leaving the Doctor to fix everything with a few waves of his sonic screwdriver.

It's one of those cases where you can almost see the behind-the-scenes trouble bleeding through to the screen (there are a few close-up shots of Matt Smith that feel like hasty reshoots against a green screen), and reportedly, this rushed finale is a result of Shakri actor Steven Berkoff being an absolute nightmare to work with.

Apparently, Berkoff just would not act, meaning that there simply wasn't enough usable footage of him to assemble a proper finale. This explains why Berkoff only appears in really quick shots, why he pretty much just stands still the entire time, and why the same few camera angles are used over and over.

While this bust-up is largely rumour-based, one need only look at the episode itself, Berkoff's disinterest towards Doctor Who, and this interview with The Power Of Three director Douglas Mackinnon - in which he states that Berkoff's work was "something that'll never be repeated" - for some quote-unquote "proof" of Berkoff's bad behaviour.