Emmett Hughes
— Tristan
Thomas Gibson
— Joseph (voice)
Bronagh Waugh
— Siobhán (voice)
Aisha Tyler
— Louise (voice)
Adam Rodriguez
— Richard (voice)
Fionn William O'Brien
— Declan (voice)
Jonathan Sadowski
— Hemingway (voice)
Paula Malcomson
— Gráinne (voice)
Emily Bett Rickards
— Caitlin (voice)
Jerry Ferrara
— Jerry (voice)
Amber Nash
— Female Radio Host (voice)
Lucky Yates
— Male Radio Host (voice)
Paget Brewster
— Dr. Lynch (voice)
Caroline Morahan
— Susan (voice)
Kevin Pollak
— Cru (voice)
Kirsten Vangsness
— Heather (voice)
Jean-Luc Bilodeau
— Barry (voice)
Nelson Estevez
— Gio (voice)
Sam Rockwell
— Sam (voice)
Ciarán Hinds
— Jim (voice)