This was... bizarre. Jack frowned, watching the man he believed to be the Master wandering about. He certainly sounded different. At least in tone. Interesting. Jack wasn't sure what to make of it, and if he'd learned one thing during his time with the Master, was not to trust him for any reason.

Jack inspected this man carefully. So erratic. "Charmed. Congratulations." Jack took one more look at the Doctor and then back to Koschei, reluctantly taking his hand to shake. What was happening? "Uh... Doctor? Could I have a word?"