Sarah Jane..This is the curse of older Dr. Who. I was rewatching "Invasion of Time" yesterday and it just gets dragged out two episodes longer than it needed to be after the main threat is solved and then another tacked on the end (Sontarans, again!), and those two final episodes were thirty minutes each of the cast running around an abandoned hospital that's being used as the bowels of the Tardis. Not in a creative way, mind you, it was black garbage bags over the windows and clonking around hallways. For 30 minutes. Until the Doctor makes a ray gun to kill the Sontarans in two. Some of the serials at this time are pitch perfect, and then there are some that are really just there to cut to down on production budgets and fill a time slot.
Although, with Nu Who, I will say that is one draw-back I definitely think hinders it sometimes: it moves too fast sometimes and doesn't let anything develop. It's a pick-your-poison type of situation. I prefer the slower nature of the early series where atmosphere and tension can be built, rather than the glossy, flash-bang, flashcard cues of Nu Who. That's just me.
Is it too much of a distraction to ask who's your favorite companion?
Oh and Amy Pond
Adult crush lol..