Causes all crew on a ship or base to kill each other and finally themselves.
- Discard one crew card a turn until all are removed (at crew player's choice).
- Crew at that location cannot function.
- Discard fatal horror after all crew are eliminated. Unit may not be engaged until a crew card is placed on it.
- 16 research points are required to negate a fatal horror. A science officer cannot negate a fatal horror and is affected by it.