The move heralded TC's third spell at the club where he signed his first professional contract as a teenager.
Craig, who progressed through Millwall's youth system, made over 80 first-team appearances for The Lions before moving on to Crystal Palace in 2007.
However he returned to Millwall, initially on loan in 2008, before signing on a permanent basis that summer. He was part of The Lions team which won promotion from League One via the Play-Offs in 2010 and played almost 50 games in The Championship for Kenny Jackett's side before joining Brentford in June 2012.
A whole-hearted and committed defender, TC can play at centre-half or left-back and was a pivotal figure for The Bees as they won promotion to the Championship and then just 12 months later in 2014/15, came within a whisker of reaching the Play-Off Finals.
His first season back at The Den was a frustrating one, as a serious knee injury sustained making a trademark block in October 2015 kept him sidelined until making a late appearance as a sub in a 3-1 away win at Bury on 23rd April. An injury to Byron Webster in the warm-up before the Play-Off Final against Barnsley saw TC make his first senior start in seven months at Wembley - with barely 30 minutes' notice!
The popular club captain has been awarded a testimonial game at The Den against former club Brentford on 30th July (3pm) - after which all focus will be on trying to get Millwall back to the Championship once again.