Through a solar flare, the SG-1 team are propelled back in time to 1969, landing in a top military facility. Carrying a letter General Hammond gave her, Carter (Amanda Tapping) is searched by a yount Lieutenant (Aaron Pearl) who is astonished by the letter's contents. As the team is transported for futher interrogations, the Lieutenant helps them escape and tells them the letter appeared to be from him many years in the future. Desperate to find the Stargate so they can return to the present, the team seeks out Catherine, who they believe may know its location. Hitchhiking to see her in New York, they are picked up by Michael (Alex Zahara) and Jenny (Amber Rothwell), two friendly flower children on their way to Woodstock. They immediately warm to the team's fugitive appearance. Carter discovers that Hammond's note includes the date of the next solar flare and they race to the Stargate before their chance of leaving the past is lost for good.
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