Confident Hamilton Academical ended Ian Baraclough's 100% winning record as Motherwell manager as they routed their Lanarkshire rivals.
The Accies looked the sharper from the first whistle and Dougie Imrie's low early opener came as no surprise.
Ali Crawford knocked home from close range before the break and Mickael Antoine-Curier added the third.
And Accies showed why they have been unbeaten at home since early August as Tony Andreu and Daniel Redmond netted.
Hamilton v Motherwell_sw1Hamilton v Motherwell_sw2Hamilton v Motherwell_sw3Hamilton v Motherwell_sw4Hamilton v Motherwell_sw5Hamilton v Motherwell_sw6Hamilton v Motherwell_sw8Hamilton v Motherwell_sw9Hamilton v Motherwell_sw10Hamilton v Motherwell_sw11Hamilton v Motherwell_sw12Hamilton v Motherwell_sw13Hamilton v Motherwell_sw14Hamilton v Motherwell_sw15Hamilton v Motherwell_sw16Hamilton v Motherwell_sw17Hamilton v Motherwell_sw19Hamilton v Motherwell_sw20Hamilton v Motherwell_sw21Hamilton v Motherwell_sw22