The Counteragent

Overview

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.

Episode Information

Guest Stars

Chris Ellis

Agent Chapman

Terry O'Quinn

Kendall

Stephen Davies

Sark Associate