Packed to the Rafters - Season 5 Episode 21 Free to Choose
Overview: Hours have passed since Coby took off and he's not answering his phone. Dave is feeling privately guilty over having not stopped Coby from leaving when he had the chance. So when he learns that a drunken Coby recently accosted Duncan and tried to get him to drop the assault charges, he calls the troops into action. But time is short, as now they aren't the only ones looking for Coby — the police now have a warrant for his arrest.