This is for people who remember Irwin Allen's scifi TV shows as a kid. He did four of them - Land of the Giants, Voyage to the Bottom of the Sea, Lost in Space, and Time Tunnel.
Though I liked Lost in Space and VTTBOTS, Time Tunnel was always my favorite. The episodes included in this set include probably the best in the series. Allen's show always tended to detriorate the longer on the air they were.
Still, they were fun. If you have young kids they will enjoy the show even if they are a bit sholocky by todays standards. They also have an upbeat, positive out look on life you don't see much of today.
I used the first in the series (Rendezvous with Yesterday) as a part of a unit to teach 4th graders to tell time. See the story here: http://www.unmuseum.org/notescurator/timetunnel4th.htm