The Counteragent

Summary

Sydney races to find a cure for Vaughn, but in order to find the antidote, Sydney must make a deal with Sark that could endanger Sloane's life. Meanwhile, Will continues his research for Vaughn and discovers some disturbing inconsistencies involving 20-year-old standardized IQ tests.

Guest stars

• Merrin Dungey as Francie Calfo
• Chris Ellis as Agent Chapman
• Jim Hanna as Claus Richter
• Terry O'Quinn as Kendall
• Stephen Davies as Sark Associate
• Don Took as Agent Grey
• Petra Wright as Alice Williams
• Austin Tichenor as Dr. Nicholas
• Victor McCay as Agent Rudman
• Stephen Mendillo as Henry Fields