Lead psychologist for Treadstone behavioral conditioning programs.
Hirsch explains the conditioning and choices behind Bourne's past.
Bourne confronts Hirsch about Treadstone, and Hirsch reveals that Bourne volunteered and killed a man to prove his loyalty.
Vosen relies on Hirsch's Treadstone expertise during the crisis.
After Bourne steals the Blackbriar documents, Vosen informs Hirsch and involves him in the response.
Landy's investigation contributes to consequences for Hirsch's program.
The ending reports Hirsch's arrest and a criminal investigation into the Blackbriar operation that Landy helped expose.
Explore the full interactive character relationship map of The Bourne Ultimatum
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