Centre-half Rea was teed up for his strike by the excellent Olly Lee after a Hitchin defender could only head Luke Gambin's 50th-minute corner into the midfielder's path.
With four minutes left, Collins made space for himself on the edge of the box to net his fourth goal in three Town appearances after his debut goal at Bedford was followed by a brace in the win over Slovenian side NK Bravo at the weekend.
You can see the goals from analyst Peter Booker's camera below...