The Barque of Heaven

On a routine expedition to an abandoned Goa'uld world, SG-1 inadvertently initiate Ra's ancient trial - and once begun, the trial cannot be halted. Relying on Dr. Daniel Jackson's vast wealth of knowledge, Colonel O'Neill must lead his team from planet to planet, completing each task in the allotted time. There is no rest, no respite. To stop means being trapped forever in the farthest reaches of the galaxy, and to fail means death.