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Stargate SG-1 episode
“Sight Unseen”
Original Air Date	Sci Fi Channel: January 17, 2003
Season	6
Episode #	13
Production #	613
Writer(s)	Ron Wilkerson (story) Damian Kindler (teleplay)
Director	Peter F. Woeste
Guest star(s)	Jody Racicot Gary Jones Betty Linde Michael Karl Richards Raimund Stamm Jennifer Steede Jacob Chaos Brad Dryborough Jacquie Janzen
Episode Order
Previous	Next
"Unnatural Selection"	"Smoke and Mirrors"

Sight Unseen is episode 13 of Stargate SG-1 Season 6.

Summary

A device of unknown purpose is brought to Earth and shortly after, the inhabitants of base begin to see alien creatures able to pass through solid objects. When people outside the base begin to witness the creatures, the SGC must find a way to contain the problem without revealing the problem's true origin.