[9] Cook returned to Watford in March 2003, after QPR manager Ian Holloway had been hoping to sign him permanently.
Cook made no secret of the fact he was a fan of QPR, and he elected to leave Watford to join them at the end of his contract in July 2004.
[13] Cook played a significant role in QPR's battle to avoid relegation in the 2006–07 season, and he formed a great partnership with striker Dexter Blackstock.
[citation needed] QPR rejected a bid from Fulham for Cook in June 2007,[14] but he eventually joined them for £2.5 million on 19 July 2007, signing a four-year contract.
[17] He rejoined former club Queens Park Rangers on loan for the 2008–09 season in July 2008, with a view to a permanent move.
[18] Fulham manager Roy Hodgson confirmed on 5 December that Cook would sign a permanent contract with Queens Park Rangers for a fee of £850,000, which could rise to £1.2 million.
[21] On 24 August 2012, Cook joined Football League One side Leyton Orient on a five-month contract, after his release from QPR.
[25] He scored his sixth goal of the season in a 2–0 away victory against Southport a week later, with a chip from an extremely wide angle.