Harbour is also known for his role as CIA Agent Gregg Beam in "Quantum of Solace", as Shep Campbell in "Revolutionary Road", and as Russell Crowe's source in "State of Play". He also received praise for his role as spree killer Paul Devildis in a 2009 episode of "". Harbour's other film credits include "Brokeback Mountain", "The Green Hornet", "End of Watch", and "Between Us". In 2013, he played a small role of a head doctor in the television series "Elementary". From 2012 to 2014, he also played the recurring role of Elliot Hirsch in "The Newsroom".