Biography
John O'Callaghan is part of the cast of Stargate Atlantis.
Photo and biographical details provided by TMDb.
Filmography
A selection of the most notable projects, via TMDb.
Acting · 5
Stargate Atlantis
2004 · Niam
We Were the Mulvaneys
2002 · Abelove
The Agency
2001 · Declan Berwick
Deep in My Heart
1999 · Priest
Never Met Picasso
1997 · Paul