Old Who recommendations?

In my attempt to try to get into old Doctor Who, I'l be renting a number of DVDs that are available on lovefillm.com.
I already watched Genesis of the Daleks and enjoyed it (how does Tom Baker not trip over that scarf of his?).

So, old Who fans, which episodes would you recommend?

Chinese Food Made Easy

(BBC2) Not much new to me but nice and well presented, giving alternatives for specialised ingredients (e.g "if you can't get black rice vinegar use balsamic"). Easy, quick, using only fresh ingredients and much lighter than a takeaway. Cheap, too. Take that, Delia and your stupid processed food shite.