Ben Browder

A freak accident during an experimental space mission catapults Astronaut John Crichton across a thousand galaxies to an alien battlefield.

SG-1 searches for an ancient weapon which could help them defeat the Ori, and discover it may be in the Ori's own home galaxy. As the Ori prepare to send ships through to the Milky Way ...

Ba'al travels back in time and prevents the Stargate program from being started. SG-1 must somehow restore history.