Earthshock

“E-space is another universe. There isn't a taxi service goes back and forth.”

“When did you last have the pleasure of smelling a flower, watching a sunset, eating a well-prepared meal?”

“Now I'll never know if I was right.”

DOCTOR: Look, er, I'm sorry about our argument earlier.

ADRIC: So am I. I over-reacted.

DOCTOR: Do you really want to go home?

ADRIC: No, of course not. There's nothing there for me any more.

DOCTOR: So you've done all these calculations for nothing.

ADRIC: Well, it made a point, didn't it? Besides, who knows? I might change my mind again.