Stardate: 50537.2. Ensign Vorik expresses his desire to mate with B'Elanna during his Pon-Farr. After they get in a brawl over the matter, Torres begins showing signs of the Pon-Farr herself.

Stardate: 50912.4. Crew members are replaced one-by-one with aliens from an unknown race.

Stardate: 51268.4. The Voyager crew finds its determination and morale challenged when trying to survive a brutal, long-lasting conflict with a race called the Krenim.