Stargate SG-1: Half Life

Stargate SG-1: Half Life is an upcoming audiobook&mdash;part of the third series to be released&mdash;which is going to be released by Big Finish Productions based on the Stargate franchise, featuring characters from Stargate SG-1. Written by James Swallow, it will be an hour-long "episode" of the show and the first part of a trilogy.

Publisher's summary
No one is going anywhere. Cheyenne Mountain is in full lockdown. All returning SG teams are being diverted to the Alpha Site. I’m isolating the base until we can deal with this situation.