← Previous Next → 3x16 You Don't Know Jack 4.5/5 (6 votes) First Aired: Aug. 28, 2009 on SyFy Summary: Global Dynamics sonic cleaning coincides with a phenomenon in which the citizens of Eureka develop a communal form of Alzheimer's disease. Meanwhile, Allison goes into labor. Source: www.TVRage.com

Main Characters in this Episode

• Henry Deacon
• Zoe Carter
• Deputy Jo …
• Douglas Fa…
• Zane Donovan
• Nathan Stark

• Eva Thorne

Guest Stars Jack Carter played by Colin Ferguson Allison Blake played by Salli Richardson-Whitfield S.A.R.A.H. played by Neil Grayston Vincent played by Chris Gauthier Dr. Kinnison played by Richard Side Dr. Ashe played by Jillian Fargey Tess Fontana played by Jaime Ray Newman Dr. Bubay played by Andrew Cownden Computer Voice voiced by Bridget Hoffman Larry Haberman played by Christopher Jacot Spencer Martin played by Shayn Solberg More