Colin Calderwood managed Northampton Town from October 2003 to May 2006, leading the club to two play off campaigns and an automatic promotion.
In the first part of our three part feature looking back on his time at Northampton Town manager, we cover the period from his appointment in October 2003 through to the play off semi final defeat at Mansfield Town in May 2004, including that FA Cup 4th round tie with Manchester United.
Speaking about his memories of that season, Calderwood said, "The turning point for me was the Boxing Day game at Bristol Rovers. We changed formation to three at the back. We had three good centre halves who were among the better players in the group and I didn't see why we should be leaving one of them out all the time to play four at the back. We also tried three up front to be able to press the ball higher up the pitch and the first game we did that was at Bristol Rovers and the reason we got to the play offs was the run from Boxing Day onwards.
"We got on a terrific run and won a lot of games. We got to the play offs and played Mansfield. Previous to that we won at Swansea and beat Bury at home when we were down to ten men and 2-1 down. We won that game to give ourselves a chance and we won at Mansfield on the last day of the regular season to meet them again in the play offs. We were beaten by a better team in the first leg but the second leg will always be in my top three games in terms of excitement and the level we played at."
You can hear the first part of our feature in full below.