The Captain is one of my all-time favorite Doctor Who villains. Actually, he's just one of my all-time favorite villains. All the bluster was there to hide how brilliant and dangerous he really was. He even had the Doctor genuinely worried there for a bit.
I almost went with "Mister Fibuli" as my Internet alias.
Isn't this the only Douglas Adams written episode that actually said "by Douglas Adams" on the opening credits?
As I understand it, he helped on lots of other scripts, and he had several original ones he wrote himself, but he usually had one major scene (like having a huge roman building full of cats) that they couldn't pull off even with their low-budget FX.
He wrote City of Death, but chose to be credited anonymously under a pseudonym as he felt it was respectful to the guy who came up with the basic storyline, but was unable to fully finish the script due to personal problems.