There was nothing like a spontaneous game of Naked Hide and Seek to get the blood pumping, among other things. Jack had found Ianto easily enough, but catching him was a different matter.
With a wicked grin, Ianto had shouted, “Catch me if you can!” and taken off at high speed. Not that Jack minded; the chase was half the fun.
So there they were, stark naked, running around the Hub…
Just as Jack finally caught Ianto and prepared to claim his prize, the TARDIS materialised and out stepped the Doctor.
“Oh! Is this a bad time for a visit?”