Ryan Kwanten as Jonah

Sarah Snook as Stevie

Ryan Corr as Gus

Bojana Novaković as Ava

Laura Brent as Erica

Alice Parkinson as Alison

Susan Prior as Marcie

Lewis Fitz-Gerald as Dr. McKenzie

Kathryn Beck as Becky Kincaid

Belinda Bromilow as Claire

Zoe Carides as Lab Technician

Lulu McClatchy as Jennifer

Daniel Henshall as Dave

Dilshan Rain as Party Goer