4-03: Day of Honor
During an important Klingon holiday, B’Elanna’s round of bad luck intensifies when her shuttle explodes, stranding her and Tom Paris in environmental suits.
Voyager is confronted by the Hirogen after usings their ancient network of relay stations to retrieve letters from home.
4-14: Message in a Bottle
The Doctor is sent to the Alpha Quadrant through an alien relay network, arriving aboard a Starfleet vessel commandeered by Romulans.
4-08: Year of Hell, Part I
Voyager is repeatedly attacked by Krenim warships while a scientist alters history by eliminating entire races from existence.