i remember the watching and really enjoying the show when it was originally on way back in 1995. it stared jerry o'connell, sabrina lloyd, and john rhys-davies as people who got sucked into a portal that opened up on alternate earths. they would show up in these different worlds that looked a lot like ours, but with an alternate history that would result in differences from the world we know. they would slide into these places, but not know when and if they would ever get to slide back out. they are continually stuck sliding to different dimensions without ever being sure if they will return to their home.
i just rewatched the original two hour pilot episode. i had been fearing the worst, figuring it might be one of those shows that i would regret going back and watching because it would ruin my positive memories of it by being terrible. but i have to say, i was very surprised! it holds up really well! the special effects are very dated (14 years has a way of doing that...), but the story line and the execution are still very good. the different worlds they go to vary in its changes, everything from a world where jfk is still president and red lights are go and green is stop, to a world where russia won the cold war and the united states is run by a communist regime. the set up and possibilities are really exciting, i just hope that the other twenty episodes fulfill that promise!