The first two seasons gained more than 20 million views.
'Flunk' follows shy 16-year-old Ingrid as she explores her sexuality and identity.
This series sees Ingrid prioritising her own happiness after recovering from a suicide attempt, but she struggles when she develops feelings for the same girl as her best friend Brayden.
Writer/director Ric Forster ('Neighbours') and producer Melanie Rowland are joined by writers Mekelle Mills ('Zoe.Misplaced'), Phoebe Williams, Helen Le and Luke McCarthy.
