Three years after being kicked out of the science department for his theory of Time warps, Rick Marshall is reduced to working as a teacher at the George C. Page Museum. He meets Holly Cantrell whose finding urges him to create a tachyon amplifier to enable time warp travel. Once they activate the amplifier, Rick, Holly and their cave tour guide Will Stanton end up in a parallel universe where all timelines converge. They soon meet some ape men and...

An elite military unit (SG-1) must flee back to Earth when two members of their team inexplicably disappear into thin air. But they return to a world in which the Stargate--an ancient device which allows them to travel to hundreds of planets--was never discovered, and their own history has been erased. Now they must convince a dubious government and military that the timeline was altered by a powerful alien enemy (Ba'al) in order to conquer Earth,...