The opening numbers show "23 Years Later" in the lower left box, yet in the opening scene we see Mary Paulson talk about what the kids are doing 25 years later. Seeing how this show stays in real time, it would be a 25 year span (1985-2010).
When Granger and Sinclair are looking up Winslow's background there is a computer showing a photo of Winslow in a Marine Corps uniform. Granger reads, "Winslow was in the Corps from '82 to '84." Sinclair then reads, "It says, uh, other than honorable discharge," to which Granger replies, "That's the Army's way of sweeping an uncomfortable situation under the rug". Winslow was in the Marine Corps - not the Army.
23 YEARS LATER
Original International Air Dates:
Germany: May 27, 2010 on Kabel 1
Czech Republic: May 5, 2011 on TV Nova
Finland: November 6, 2012 on Sub