Sandra Pullman and Jack Halford (ghost) in “The One That Got Away”

I can't leave.

Well, you can't stay here for ever.

I belong here, Jack.

You're afraid to leave, that's your problem. You're comfortable, Sandra. Never get comfortable.

What we do here is important, you said that.

Of course it's important. And it'll be important long after you're gong. But you built the ship, you don't have to go on steering it for ever. What's the alternative? You going to stay here till you get your pension? Then what? Take up gardening? Maybe you're going to move to the other side of that window and become another one of those boring old bastards out there. You're going to take the job, Sandra, we both know that. Let's not kid ourselves.

I miss you, Jack.