Re: TNG episodes where they hang out with species without warp drive
I can think of just two examples of such: "Pen Pals" and "Homeward". And in the former, nobody actually suggests sitting back and watching the Dremans die; it's merely a case of Picard calling for a philosophical debate on what they are about to do before they actually get on with it, lest anybody think that the PD could be automatically and categorically ignored.
Pen Pals wrote:
DATA: We are going to allow her to die, are we not?
PICARD: Data, I want you to sever the contact with Drema Four.
(Data goes to a wall panel and taps in commands)
COMPUTER: Isolating frequency.
SARJENKA [OC]: Data. Data, where are you? Why won't you answer? Are you angry me? Please, please, I'm so afraid. Data, Data, where are you?
PICARD: Wait. Oh, Data. Your whisper from the dark has now become a plea. We cannot turn our backs.
Picard was going to allow them to die until he heard the little girls' pleas for help.
"Just give me two seconds, alright, you mad bastard!" - Montgomery Scott, Star Trek Into Darkness