Auditions 1: Melbourne, Hobart & Alice Springs
Episode: 4x01 | Airdate: Aug 6, 2006
Episodes
Auditions 2: Perth & Adelaide
Episode: 4x02 | Airdate: Aug 7, 2006
Auditions 3: Sydney & Townsville
Episode: 4x03 | Airdate: Aug 13, 2006
Auditions 4: Queensland & Albury Wodonga
Episode: 4x04 | Airdate: Aug 14, 2006
Top 125
Episode: 4x05 | Airdate: Aug 20, 2006
Top 24
Episode: 4x06 | Airdate: Aug 21, 2006
Semi Finals: Group 1 Perfom
Episode: 4x07 | Airdate: Aug 27, 2006
Semi Finals: Group 1 Verdict & Group 2 Perform
Episode: 4x08 | Airdate: Aug 28, 2006
Semi Finals: Group 2 Verdict & Group 3 Perform
Episode: 4x09 | Airdate: Aug 29, 2006
Semi Finals: Group 3 Verdict & Group 4 Perform
Episode: 4x10 | Airdate: Aug 30, 2006
Semi Finals: Group 4 Verdict
Episode: 4x11 | Airdate: Aug 31, 2006
Wildcard: Performance
Episode: 4x12 | Airdate: Sep 3, 2006
Wildcard: Verdict
Episode: 4x13 | Airdate: Sep 4, 2006
Final 12: Contestant's Choice
Episode: 4x14 | Airdate: Sep 10, 2006
Final 12: Verdict
Episode: 4x15 | Airdate: Sep 11, 2006
Final 11: Rock
Episode: 4x16 | Airdate: Sep 17, 2006
Final 11: Verdict
Episode: 4x17 | Airdate: Sep 18, 2006
Final 10: Number One Hits
Episode: 4x18 | Airdate: Sep 24, 2005
Final 10: Verdict
Episode: 4x19 | Airdate: Sep 25, 2006
Final 9: The Year I Was Born
Episode: 4x20 | Airdate: Oct 1, 2006
Final 9: Verdict
Episode: 4x21 | Airdate: Oct 2, 2006
Final 8: Disco
Episode: 4x22 | Airdate: Oct 8, 2006
Final 8: Verdict
Episode: 4x23 | Airdate: Oct 9, 2006
Final 7: Acoustic/Contestant's Choice
Episode: 4x24 | Airdate: Oct 15, 2006
Final 7: Verdict
Episode: 4x25 | Airdate: Oct 16, 2006
Up Close And Personal: Originals
Episode: 4x26 | Airdate: Oct 17, 2006
Final 6: Big Band/Rock Swings
Episode: 4x27 | Airdate: Oct 22, 2006
Final 6: Verdict
Episode: 4x28 | Airdate: Oct 23, 2006
Final 5: ARIA Hall Of Fame
Episode: 4x29 | Airdate: Oct 29, 2006
Final 5: Verdict
Episode: 4x30 | Airdate: Oct 30, 2006
Final 4: Audience Choice
Episode: 4x31 | Airdate: Nov 5, 2006
Final 4: Verdict
Episode: 4x32 | Airdate: Nov 6, 2006
Final 3: Judge's Choice
Episode: 4x33 | Airdate: Nov 12, 2006
Final 3: Verdict
Episode: 4x34 | Airdate: Nov 13, 2006
Grand Final: Performances
Episode: 4x35 | Airdate: Nov 19, 2006
Grand Final: Verdict
Episode: 4x36 | Airdate: Nov 26, 2006