"Miss Sato had come through the Rift the night of the last dance before my squadron went from training to active duty. I helped Miss Sato find a room that night. She was talking with the Doctor when I checked in on her two days later, and we left just after dinner that night. I'd have stayed, but I promised Miss Sato I'd see her home safely, however long that takes."
"The Doctor was interested in the Rift activity." Tosh didn't actually look up from her computer, chewing on a strand of hair as she studied her very rough model. "The timeline fluxed there, changed. He wanted to know why, what caused it. He didn't actually say what changed."