[That's enough to snap Jack out of fun and games time. A hand reaches out, meaning to stop the Doctor if he makes contact.]

It was a joke, Doc. Jackie isn't here. Neither is Rose. I was teasing you. The Clara part is real. We really did go on a date and she's said she'd marry me, but the rest is bullshit.

[The grin has fallen away with it, the immortal grim now.]

Am I still... ? Even here?

[Of course Jack was. Even here in this wherever it was, Jack remained a fixed point in time and unkillable.]