Derren has a changed beard style in this episode.
In this episode, Derren is no longer hiding the fact that the cards are ambigrams, and there is a graphic showing the cards rotate.
Derren: They say that if you put an infinite number of monkeys and typewriters in a room, you would end up with something amazing. And of course a lot of monkey poo.
(Martin's reaction to what was happening to him)
Martin Freeman: I'm sweating, is that sexual energy?
Derren Brown: Yes, it is.
Derren: (Voice over) One man's sanity is another man's insanity. One man's treat is another man's trick.