Voyager goes to investigate an M-class planet, discovering it is out of temporal sync with the surrounding galaxy. On this planet, time passes extremely rapidly compared to the rest of space. Voyager becomes trapped in the planet's gravitational field and is stuck....
I gave up on Star Trek Voyager long before this episode so thanks to Tim for pointing me towards it. It actually looks quite interesting.
Update: Helmets are from Soldier (1998) and suits are from Storm Catcher (1999) - thanks you Chris