Professor Yana is a fictional character portrayed by Derek Jacobi in the TV series Doctor Who.
In the first episode they appeared in, titled Utopia (season 3), they were 68 years old.
They appear in 1 episodes out of a total of 166 aired
Episodes1
Utopia
episode S3.E11 september 2007Soon after bumping into old friend Jack Harkness, Martha and The Doctor head off to Malcassairo, a distant planet where an old professor will do anything he can to keep his people alive...