These are the words spoken by the character in the promo video;
Hi, my name is Jilly. Jillian Alexander Kitzinger. My job is to see this miracle for what it is, a benefit for all mankind. It’s my job to sell it, even if that means I have to strike a bargain with the devil himself. But I think there’s something else happening, beyond the miracle, behind the panic, someone is hiding a secret, and Jillian Alexander Kitzinger is gonna find it first.
Word of advice, get out of my way. Phew! You’re welcome.
Source [Doctor Who News]