The final for this cache can be found by looking up the episode number (single digits only, the right most digit in the case of numbers over nine) in which the quote appeared.
N ab° cd.efg
W hi° jk.lmn
[a] Reinette: "It is customary, I think, to have an imaginary friend only during one's childhood. You are to be congratulated on your persistence."
[b] The Doctor: "She's a feral child. I bought her for sixpence in Old Londontown. It was her or the Elephant Man."
[c] Dalek: "This is not war! This is pest control!"
[d] Sarah Jane: "The Doctor likes travelling with an entourage. Sometimes they're humans, sometimes they're aliens. And sometimes they're tin dogs."
[e] Rose: "Is there any other way to go, Daddi-o? Straight from the fridge, man!"
[f] Rose: "And trust me, you wouldn't want to mess with our designated driver."
[g] The Doctor: "I accept that you exist. I don't have to accept what you are, but your physical existence, I give you that."
[h] Rose: "What's your job, Chief Dramatist?"
[i] The Doctor: "I was at the wedding. You got her name wrong."
[j] Elton: "Then it turned out that Bridget could play the piano. And I confessed my love of ELO. Next thing you know, Musical LINDA!"
[k] The Doctor: "I'm gonna tape over it."
[l] The Doctor: "Me, living in a house. That, that, is terrifying."
[m] Sarah Jane: "You can tell you're getting older. Your assistants are getting younger."
[n] Abzorbaloff: "No! I'm not the swine! I spit on them."
Thanks to debaere for beta testing this puzzle.