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] River: "It's not supposed to make that noise. You leave the brakes on."
[b] The Doctor: "Sorry. Checking all the water in this area. There's an escaped fish."
[c] The Doctor: "Oh, it's all mouths today isn't it."
[d] The Doctor: "Alright, it's a Jammie Dodger. But I was promised tea!"
[e] The Doctor: "Defending the planet with Meals on Wheels."
[f] Malohkeh: "From the clothing, the human female seems to be more resistant to the cold than the male."
[g] The Doctor: "Well it's always a big day tomorrow. We've got a time machine. I skip the little ones."
[h] The Doctor: "Oy! Don't diss the sonic!"
[i] The Doctor: "Well we are running into a dead end where I'm going to have a brilliant plan that basically involves not being in one."
[j] Van Gogh: "No, it's not that I don't like them. I find them complex. Always somewhere between living and dying. Half-human as they turn to the sun. A little disgusting."
[k] The Doctor: "Oh, Nasreen, sorry. Probably worth mentioning at this stage, Amy and I travel in time a bit."
[l] The Doctor: "Wrong with me? It's not my fault. Why can't you give any decent food. You're Scottish. Fry something."
[m] The Doctor: "I don't think that's such a good idea, do you? I'm a Time Lord. You're a big fish. Think of the children."
[n] Restac: "The apes are attacking us!"
Thanks to debaere for beta testing this puzzle.