Insert Mad Squeeing Noises Here.

Oh, thank you very fucking much RTD et al, for co-opting the old school theme in The Sound of Drums. I wouldn't have noticed if I hadn't succumbed to the temptation to watch The Keeper of Traken immediately afterwards - then it all became painfully apparent. Bloody hell!

Short version: The Sound of Drums was made of awesome.

( The long version - spoilers )

Edited to add: okay, the riff is from the theme tune, period, but it just seemed that much more obvious with the old-school tune.