Guest Stars

Felicia Day As Dr. Holly Marten Recurring	Tembi Locke As Grace Monroe Recurring
Trevor Jackson (1) As Kevin Blake Recurring	Roger R. Cross As Major William Shaw Recurring
Jordenn Thompson As Jenna Recurring	Kavan Smith As Deputy Andy Recurring
Chris Gauthier As Vincent Recurring	Christopher Jacot As Larry Haberman Recurring
Wil Wheaton As Dr. Isaac Parrish Recurring

Co-Guest Stars

Leo Chiang As NPC Guard Recurring	Ileeya Brown As Jenna Recurring
Jason Poulsen As Dr. Wells	Elizabeth Thai As Dr. Yoo
Geoff Gustafson As Dr. Tuchman

Main Cast

Colin Ferguson As Jack Carter	Salli Richardson As Allison Blake (as Salli Richardson-Whitfield)
Joe Morton As Henry Deacon	Erica Cerra As Josefina 'Jo' Lupo
Neil Grayston As Douglas Fargo / Voice of Sara	Niall Matter As Zane Donovan

Recap

The episode begins with Allison asking Jack, who is sitting with Andy at the cafe where he has been, as she has been searching for him all over. He tells her how the smart dust has been messing with his communication device. Jack tells her how they found the smart dust control device. Allison in turn tells Jack how Zane was arrested, just as she and Zane had stumbled upon something. Allison tells Jack that Jo, Henry and Holly none of them are acting like themselves, therefore something is wrong. Andy tells her that all of it could be the effect of the smart dust. Henry meanwhile releases Grace from captivity, much to her surprise. Jack and Andy meanwhile stop the car of Dr. Tuckman who was on the Astraes crew, and tell the baffled doctor to come along with them. ..

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