Best part of the sound of drums/ last of the time lords is the shared arc Martha and Jack have of pining hard for the doctor despite believing him to be immortal and timeless and above such things as romantic connection only to see him simp big time for the genocidal megalomaniacal sadistic bigot who made their lives hell for a year and simultaneously realise
‘Wait, seriously?!!! THAT GUY???!!! That’s the guy we’re playing second fiddle to?!’
And both of them decide ‘hmm you know what? Maybe he ain’t worth it. He really ain’t all that.’