Stargate Universe - Season 2 Episode 13 -

When Camille and Sgt. Greer use the communications stones to return to Earth, they arrive to learn there is a high state of alert in anticipation of an attack from the Lucian Alliance. They've barely arrived when an explosion traps them in the building where they find high levels of radiation - and where, they are told, there is a large bomb still waiting to go off. On board the destiny meanwhile, visiting Senator Michaels and Dr. Andrew Covel arrive to assess the viability of the mission and determine whether the government should invest in a new Icarus base.