'Light from the West' traces the events of August 21, 1879, when it was claimed that Our Lady appeared in the little village of Knock. Over one million people now visit Knock each year.

This clip shows the opening sequence of the film with pilgrims arriving in Knock, and tells the background to the apparition. Fifteen people gave evidence at a sworn enquiry, among them a young woman called Mary Byrne. The film reconstructs Mary's story of what happened on the night of the apparition. News quickly spread of the apparitions and within weeks crowds were visiting the church at  Knock.

'Light from the West' was made by Radharc and produced by Father Joe Dunn. The film, narrated by Dermod MacCarthy, was first broadcast on 24 July 1979.