Gwen licked her lips, eyes automatically scanning for people who might be listening in. When you worked for a secret organization you learned how to have covert conversations out in public. The catcher was, if someone did overhear them in Cardiff, they had retcon to wipe their memories. She didn't have that luxury here.
"Where I'm from, there's a rift - a tear in time and space - that runs right through the middle of Cardiff," she explained. "I used to work for an organization who's prime directive was to deal with all the stuff that came through the rift - all the flotsam and jetsam. It was everything from alien technology to aliens to time travelers to time refugees. I went back to Cardiff to visit, felt a shift in rift energy, and when it was gone, I was standing on a street in 1964 New York right next to my former boss." She nodded toward Jack a bit. "I've got another co-worker here, as well."