Stalker is a 2012 Irish psychological thriller film written and directed by Mark O'Connor.

Oliver Nolan, a volatile homeless man, wanders the streets of Dublin City during the Christmas period.

After an unusual encounter with an evangelist, Oliver believes he is sent on a mission from God to clean up society.

When he saves a disaffected young boy named Tommy from some local bullies an unlikely friendship is formed.

The Irish Times called Mark O'Connor "a young wizard of cut-price film-making"[4] and described the film as a "violent, picaresque trawl through contemporary Dublin discontents.