The deal at Barnsley proved to be a short-lived, as Gallen re-joined Queens Park Rangers on 19 November 2001. Two days after returning to his boyhood club he scored one and set up two others in an emphatic 4–0 home win over Swindon. A change in fortunes soon followed for Gallen and QPR, with Gallen earning the club captaincy, netting another 55 goals over the ensuing five seasons and helping the club to establish itself back in the second tier of English football. Overall, Gallen scored 97 goals for QPR, making him the sixth highest scorer in the club's history. Plymouth and MK Dons On 11 January 2007 Gallen linked up with his former QPR manager Ian Holloway, joining Plymouth Argyle on loan until the end of 2006–07 season. During his spell at Home Park he scored once in the league, during a 3–2 victory over Coventry City. He was released by QPR in July 2007. He was offered a contract by Plymouth Argyle, but instead opted to join a lower-level club – Milton Keynes Dons. Gallen played 31 games and scored nine goals as MK Dons won both promotion to League One as champions, and The Football League Trophy. Later career On 14 November 2008, Gallen joined League Two side Luton Town on an initial one-month loan, which was later extended by a further month. His run in the team at Luton coincided with a seven match unbeaten run for The Hatters, with Gallen often being used as a midfielder. At the beginning of January, Gallen had his contract at MK Dons terminated by mutual consent, and he subsequently signed for Luton as a free agent. Gallen signed a one-year extension to his Luton contract at the end of the season, a campaign that ultimately ended in Luton's relegation to the Conference, keeping him at the club until June 2010. Now in non-league football, Gallen found himself utilised back in his familiar position as a striker, scoring eighteen goals in the 2009–10 season, including his first ever hat-trick on 5 April 2010 in a 6–0 win over Grays Athletic. His goalscoring prowess saw him sign a further one-year extension to his contract, running until the end of the 2010–11 season. In October 2010 Gallen joined Barnet on a three-month loan deal. He scored one goal in nine appearances during his time at the club, before returning to Luton on