Wissenswertes

The shooting in Scotland that Seamus refers to is the Dunblane Massacre, a shooting at a Scottish primary school. It is the deadliest shooting in British history and led to the outlaw of many gun ownership. British tennis player Andy Murray was a pupil of the school at the time.

During the scene where the bagpipes are playing in the ambulance bay, Owen states that he thinks the sound of bagpipes are "beautiful." Kevin McKidd, who plays Dr. Hunt, is Scottish.

This episode's title, I Walk The Line, is a song by Johnny Cash, released in 1957.

The music playing during the surgery on Seamus's son at approximately 30:04 (Hulu) is "Life on Earth" by Snow Patrol.