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Stargate Atlantis episode
“Critical Mass”
Original Air Date	January 20, 2006
Season	2
Episode #	13
Production #	2.13
Writer(s)	Carl Binder
Director	Andy Mikita
Guest star(s)	David Nykl Beau Bridges Mitch Pileggi Bill Dow
Episode Order
Previous	Next
"Epiphany"	" Grace Under Pressure"

Critical Mass is episode 13 of Stargate Atlantis Season 2.

Plot

An agent of The Trust plants a bomb in Atlantis and they must uncover who it is and how to disable it before the Wraith arrive and discover Atlantis still remains.

Guest Stars

• Beau Bridges as Gen. Hank Landry
• Mitch Pileggi as Col. Steven Caldwell
• David Nykl as Dr. Radek Zelenka
• Jaime Ray Newman as Lt. Laura Cadman
• Ellie Harvie as Dr. Lindsay Novak
• Ben Cotton as Kavanagh
• Bill Dow as Dr.Bill Lee
• Peter Flemming as Agent Malcolm Barrett
• Gary Jones as Sgt. Walter Harriman