Amanda Tapping

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

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 ...

Four low-ranking astronauts are stuck together on an orbital Sanitation Station after they bring a mysterious device aboard their ship and all life on Earth disappears. Little do they ...