"By dialing the gate." She does her best to explain the basics without throwing a certain someone under the bus too much, no matter how she feels about the situation. "Rush, the guy in charge of trying to dial the ninth chevron, was told to dial Earth and he didn't. He decided to take the one chance he had to dial the address he had and..."

TJ trails off and looks at Ianto. "They wanted control of the planet and the gate that was on it. Dialing that address would have given them control of the ship we ended up on and, eventually, they found a way onto it from another entrance point. They tried to take it over with someone from the SGC's help."

She doesn't want to talk about it, really, and so she goes back to John's last question. "Around eighty of us made it to the ship. The Destiny. It was an Ancient ship." And then, because she honestly doesn't know how much Ianto knows, she clarifies. "The aliens, not the time frame."