Mark Costello is an actor, known for Tribes (1990), My Last Day (2010) and Witness (2000).
ER - Season 2
ER - Season 5
ER - Season 3
ER - Season 11
ER - Season 15
ER - Season 6
ER - Season 10
The West Wing - Season 5
ER - Season 13
Criminal Minds - Season 4
ER - Season 7
ER - Season 8
ER - Season 9
ER - Season 14
Full House - Season 1
ER - Season 1
Everybody Hates Chris - Season 2
ER - Season 4
ER - Season 12
An Accidental Christmas
MacGyver - Season 7