For those of us who watch 24, we've grown accustomed to Jack's brusqueness, and his oft-repeated lines like, "Send it to my cell (or PDA)!", or his hostile interrogation techniques. All were on display in The Sentinel, as he struck a familiar pose, trusting noone, and "following the evidence".
The film was interesting, but fell short of the twists and turns expected from 24 fare - as in an hour and 48 minutes, you didn't have time for true character development, or too many alternative plot threads. Simply put, the movie went from threat to subplot to main character being mistrusted, on the run, discovering the true threat, and returning to good graces. Not even those points that were expected to be surprises did much, as they were dealt with quickly.
While The Sentinel wasn't the famed "24" movie that is in the works, it was a hint as to what we can expect - some action with a thinner plot, and amusing one-sided acting by Sutherland. And if you do see the movie, try and figure if the "subplot" could actually happen in a world of such intense security and media scrutiny. My money is against. Explains the critics average review being a C+.