Message in A Bottle.


While exploring a barren planet, O'Neill and the SG-1 team find an orb. They think it is a time capsule of some sort. They bring it back through the Stargate. When DR. Carter and Daniel begin to test it, the object begins to heat up and become a threat to the facility. Sending it back through the Stargate is the only option. The Orb, however, shoots arrow type rods through the walls, floor and ceiling, and one of these rods pierces O'Neills shoulder, pinning him to a wall.

An investigation reveals that the object is an alien organism that is infecting people, computers, even the building itself. The computer screens go dark and the facilities self destruct mechanism begins a countdown. Only the organism can can stop all of this.