Jack watched at first. Watched with an intense curiosity. His surety that she was familiar with the situation seemed to be confirmed by her actions, and he stood back, arms hooked together behind him.

Stood back that was until Reinette revealed the masked figure behind the curtains. He didn't advance at first, he watched and tried to evaluate. But then, as the weapon sprung forth so did he, like a released Jack in the box.

He stepped forward and held an arm out between her and the creature, demanding with his movements that she step back so he could advance. From somewhere concealed he unsheathed his gun and levelled it directly at the creature.

"You know," he said with a tone of voice that was businesslike and strong. Captain Jack Harkness full force, "It's customary to use the front doors and not the windows. And I'm not much for the whole 'pay no attention to the man behind the curtain thing either, sorry."

But it was... ticking... still ticking. And what was that? It sounded like... no, it couldn't be.

"Jeanne-Antoinette," he called behind him, "you okay? You know these things?"