“If the Wheel is Fixed” is episode one of season three of Andromeda.
At the end of the season two finale, “Tunnel at the End of the Light”, Tyr and Beka had taken the Eureka Maru with a super-bomb that Harper had created to destroy the dimensional tunnel that was spewing forth thousands of alien ships.
They had succeeded, but when the Maru returned to the Andromeda, they were not on board.
Dylan tries to find the two of them, but is unsuccessful. Then they suddenly appear on the ship. Neither says what happened, and both seem to be acting a little strangely.
No real clue who these new enemies are. It’s possible they are connected, somehow, to The Spirit of the Abyss, the deity and creator of the Magog. Which is worse, a brand new enemy that has significant numbers, or a new faction of the old enemy? Possibly the second case; in the first, perhaps both enemies could be turned on each other.