Caretaker

While searching for a missing Maquis ship with a Starfleet spy aboard, USS Voyager is swept away to the Delta Quadrant, more than 70,000 light-years from home, by an incredibly powerful being known as the "Caretaker". * Originally shown as a two-hour pilot movie on the UPN network, but in syndication is shown as two separate episodes.

Summary from Wikipedia, CC BY-SA 4.0.