Among the second season's 22 episodes, "The Serpent's Lair" concludes the cliffhanger from the end of the first season in a rollercoaster of wit, plot twists, and cutting-edge special effects as the SG-1 team resign themselves to a suicide mission. In the two-parter "The Tok'ra," Sam's estranged father is dying of cancer, but her obligations sway her toward saving a member of the Goa'uld renegade Tok'ra who is also dying. In "Show and Tell," the central story arc takes a dramatic turn when a child arrives to warn that some survivors of a Goa'uld attack are determined to eliminate anyone who might host their enemy--which means Earth as a whole. There's great fun to be had in "1969," with a time-travel plot that loops many aspects of the show's story lines together, and the cliffhanger finale, "Out of Mind," has Jack experience an Aliens-style awakening 79 years into his future. --Paul Tonks