Darren fares better than dad as Posh win
Posh defender Tommy Rowe, striker Craig Mackail-Smith and skipper Grant McCann scored the killer goals in the 78th, 80th and 85th minutes to inflict on a stunned Huddersfield their first defeat in 28 league matches.
Victory marked a triumphant return to Peterborough for Ferguson, who was sacked by Preston in December after leaving London Road in November 2009, and he has now led Posh to a third promotion in four seasons.