Larger encounters that should take a full session if not longer.

1. Alternate Dimension version.

2. A planet suddenly appears out of nowhere in front of your ship, swirling with a strange fog.

3. An old guy with large weapons claims he is a time traveler sent back to help the PCs. It can’t be true, can it? 

4. The crew loses their memory, no one knows who they are, a log file is flashing on the screen waiting to be played.

5. The ship’s sensor picks up a person floating in the middle of space. There are no other readings in the area, 

6. A specific, triangular sector of deep space causes instrument malfunctions and mysterious disappearances. You are hired to investigate and take readings of the area to see what is amiss. 

7. A mysterious fire is burning in the vacuum of space, despite the definite lack of oxygen.  

8. A Wormhole opens up, in front of the ship.

9. A Q appears on the ship, pretending to be the god Hera.

10. "Ghosts" start to roam the ship.

11. Energy being that enters the ship and starts to duplicate crew to learn more about the people on board the ship.  Causes no harm just duplicates them.  First clue will be that some crew enters the bridge moments after the same crew leaves the bridge.

12. Energy being that enters the ship and starts to replace the crew,  It disintegrates the people it replaces.  First clue will be that the crew really doesn't know what they should know.  Won't know the fellow crew or how to perform its duty.