Edith Keeler and Spock in “Unfinished Business”

Edith Keeler

You know as well as I do how out of place you two are around here.

Spock

Interesting. Where would you estimate we belong, Miss Keeler?

Edith Keeler

[to Spock] You? At his side. As if you've always been there and always will. [to Kirk] And you... you belong... in another place. I don't know where or how... I'll figure it out eventually.

Spock

I'll finish with the furnace.

Edith Keeler

'..., Captain.' Even when he doesn't say it, he does.