Air Date: May 5, 2011

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Currie Graham as Walter Mashburn a highly successful billionaire businessman. He first appears in the Season 2 episode "Redline" as Read More

Currie Graham as Walter Mashburn a highly successful billionaire businessman. He first appears in the Season 2 episode "Redline" as a murder suspect, but is cleared by Patrick, for whom he has quickly grown respect. This respect deepens in the Season 3 episode "Red Hot", where Mashburn is saved from assassination attempts, and along the way develops a (brief) romance with Lisbon Read Less