They are running out of options. At this point, absolutely anything that might help them... It could get her killed. Never mind that, at the rate they're going, it's likely to get her killed, and just because no one's actually died yet...

"I think Gwen's in her office." It's been there or in the TARDIS for some time now, and he passed her in the hall not that long ago. "We should talk to her."