Colin Baker truly shines in this one. You grow to love and appreciate his Doctor and also Mel (who I’ve never been particularly interested in) through their comparison with the fake doctor - who is everything the doctor shouldn’t be.

Baker is, of course, amazing in audio but does particularly well here because they don’t write him as too pretentious or judgmental - it’s a well judged portrayal. This story also proves that Doctor Who does not have to be serious to be engrossing. It’s properly funny.