Overall Rating: Good
Heading through the stargate on a mission, SG-1 is time warped to the past. The team is still on Earth, in the year 1969. They must unravel the puzzle of how to return to their own time, while not making any changes to the past. Standard time travel stuff.
There are some interesting moments when SG-1 interacts with the military in 1969. The story includes cliche, benign hippies, but not much else from 1969. No civil rights movement, and only an acknowledgment of the Vietnam War. Essentially, this episode introduces time travel using the stargate.
There is a whole lot of lucky happenstance.