One the great scenes in the Doctor Who Fiftieth anniversary special, The Day of the Doctor was when Tom Baker (the fourth Doctor) appeared as the curator. So, why couldn’t the other classic Doctors, Peter Davison, Colin Baker, Sylvester McCoy, and Paul McGann return in cameos as well? It could be part of the storyline of the Doctor searching Galifrey. Each actor could appear as a wise sage to advise the Doctor. It looks as the Peter Capaldi Doctor will be struggling to get his bearings. It would be fun to see people from the past helping him.