Originally Posted by mgkdragn
When they did the flashback to Finch building the machine .. he did not have the limp or the stiff neck ..
In that episode the last flashback with Finch was 2004 (when "The Founder" found out about the true secret of the machine) and he didn't have it then so it happened between 2004 and the present.
I did find it interesting that in the last original episode and Reese walked in and didn't see Finch and he started looking at this books, the one he pulled out was, "Ghost in the Machine." How apropos!