Message in a Bottle

SG-1 brings back a mysterious sphere from P5C-353. The sphere suddenly sprouts rods that impales O'Neill's shoulder, pinning him to the wall. After attempts to remove it, SG-1 discover it contains microscopic aliens that feed on energy who are the last of an alien race. They eventually agree to be relocated to P4G-881, a planet that is a more suitable home than Earth.