Just re-watched a few classic Baker's and although I love this story it leaves a little sad at the end.
Partly because it's been such fun and it's sad when it's over (and with the benefit of hindsight you've got Creature from the Pit next - yuck!)
But partly because of Duggan, I just feel sorry for him. It seems to me he's just a bumbling, likeable, fool. Classic series never went to deep into the characters but for all we know he has no one in his life, not a great deal of excitement and then all of a sudden he has the adventure of a lifetime and then just as quickly it's all over and the people he' shared it with are leaving and he'll never see them again!
I always feel melancholy when watching them run away shouting bye bye Duggan and hoping he's got a nice wife and kids to go back too and tell stories to.
I get a similar feeling with The Stones of Blood, with the Professor as essentially she's left all alone at the end of the story. I know I'm being stupid, neither character seems particularly sad about their situation.