As someone who’s been a Doctor Who fan since the 80s, I was torn about that. On the one hand, I liked seeing the previous Doctors again. And I hadn’t heard that it was going to happen, so it was a nice surprise. On the other hand, there’s no real reason for them to have aged, other than the difficulty of hiring a 30-year-old Peter Davison these days. Colin Baker, in particular, looks quite different than he did as the Doctor. It was a bit distracting, and almost felt like somebody felt bad that only Tom got to be in the 50th anniversary show back in 2013, and decided to rectify the situation.