 He has also guest starred on television series such as "Psych", "Supernatural", "24", and "Falling Skies".Klattenhoff starred in J.J. Abrams' television film "Anatomy of Hope" and appeared in the Guillermo del Toro film "Pacific Rim" (2013) and the sci-fi thriller "After Earth" (2013).In March 2013, Klattenhoff joined the cast of the NBC thriller "The Blacklist", as FBI Field Agent Donald Ressler.