Doctor Who: 20 Things You Didn't Know About The Day Of The Doctor
2. The Brigadier Almost Had A Cameo
Kate Stewart first appeared in the Series 7 episode The Power of Three, where it was revealed that she was the daughter of the Doctor's old friend Brigadier Alistair Gordon Lethbridge-Stewart.
Nicholas Courtney sadly passed away in 2011, two years before the 50th anniversary year. And so the inclusion of Kate seemed like the perfect way to pay homage to the Brigadier's Doctor Who legacy.
However, things were nearly very different, and Steven Moffat was first considering adding some audio clips of the Brigadier to the episode, to give him a proper cameo. But in the end, this was decided against.
Despite his absence in the onscreen version of The Day of the Doctor, the Brigadier was present in the novelisation. There are several passages which explore conversations between him and The Curator - and we all know who he was meant to be!