Donald Mannis is a fictional character portrayed by Ransford Doherty in the TV series Castle.
They appear in 1 episodes out of a total of 173 aired
Episodes1
To Love and Die in L.A.
episode S3.E22 may 2011When Beckett's old training officer is killed, she takes off on a solo mission to find the killer. On the plane she runs into Castle who is flying out to the Heat Wave movie set. She lets him help her catch the killer.