Javier Acuna and Davide Faraoni put the home side two up with well-taken individual strikes either side of half-time, but the visitors hit back with 15 minutes remaining through Josh Murphy. The clock ticked down and Watford sensed victory, but Hooper equalised with the last kick of the ball to send the tie into extra time. The summer signing from Celtic then scored the winner as he coolly finished when through on goal with just five minutes remaining.
Paul Lambert's Aston Villa had no answers as Tottenham Hotspur romped to a 4-0 win at Villa Park. Jermain Defoe and Paulinho struck either side of half-time before Nacer Chadli got in on the act. Defoe then rounded off a convincing victory with his sixth goal of the season.
Chelsea avoided a potential third-round banana skin as they did enough to see off a gutsy Swindon Town side by two goals. Fernando Torres and Ramires secured safe passage for Jose Mourinho's side who made his intentions clear from the start by naming a strong second string worth an estimated £185m compared to Swindon's £550,000 at a sold-out County Ground.
Sunderland launched the post-Paolo Di Canio era with a morale-boosting 2-0 win over Peterborough United thanks to goals from Emanuele Giaccherini and substitute Valentin Roberge.
Darren Bent climbed off the bench to fire Fulham to their first home win in almost six months with a 2-1 home win over Everton. The visitors dominated the first half and deservedly took the lead through the former Rangers midfielder Steven Naismith. Dimitar Berbatov then levelled matters with his first goal of the season before Bent wrapped up the win in front of England manager Roy Hodgson less than three minutes after his introduction from the bench.