The complete fourth season of the US drama series in which FBI Special Agent Don Eppes (Rob Morrow) recruits his mathematical genius brother Charlie (David Krumholtz) to help the Bureau solve a wide range of challenging crimes in Los Angeles. Episodes are: 'Trust Metric', 'Hollywood Homicide', 'Velocity', 'Thirteen', 'Robin Hood', 'In Security', 'Primacy', 'Tabu', 'Graphic', 'Chinese Box', 'Breaking Point', 'Power', 'Black Swan', 'Checkmate', 'End Game', 'Atomic No. 33', 'Pay to Play' and 'When Worlds Collide'.
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