Picture from Impostor
Overall C-

It's 209 and Alpha-Centaurians have been trying to overtake Earth for some time.

Violence D
Sexual Content C+
Profanity C-
Substance Use B+

Impostor

IT'S 2079 AND Alpha-Centaurians have been trying to overtake Earth for some time. The electromagnetic domes built by Earthlings over choice areas of cities provide some protection, but now the aliens have a new tactic. Imbedding a powerful and undetectable bomb inside hearts of important human clones, the aliens hope the imposters will go off with a bang.

Impostor (2002) - Official site With everyone under suspicion, the head of Earth's security agency, Major Hathaway (Vincent D'Onofrio), is convinced defense scientist Spencer Olham (Gary Sinise) is now a Trojan Human. The designer of a shiny weapon intended to turn Centurians into Alpha-bits, Olham is certainly a prime candidate, and that's enough for Hathaway. Brutally abducting Olham to his lab, he wakes him up from his drug induced sleep just long enough to show a video of the last imposter having his bomb-filled heart removed by a robotic claw.

Impostor (2002) - Official site That brings Olham to his senses. During the transfer to the torture table, he manages to escape the high security lab (who didn't lock the door?) and works his way to the Dead Zone outside of the dome. His only hope to prove he's not cloning around is to compare his current body to a previous medical scan locked in the city's hospital. Amongst the humans who sleep under the stars--and attacking spaceships--Olham meets street vagrant Cale (Mekhi Phifer), who is willing to assist Olham in exchange for valuable pharmaceuticals--also stored at the hospital. With determination, the two begin the dangerous trek.

Impostor (2002) - Official siteFrantically paced from start to finish, the many shootings (some seen onscreen), brutal physical confrontations, and suspenseful dark scenes leave you begging for a moment of quiet. But aside from a married couple making love during the opening credits, there's little time to rest and count your popcorn.

Based on a short story by sci-fi author Philip K. Dick (Blade Runner), the film originally intended to run a half-hour was stretched by a team of script-gurus to feature length. That could account for what seems to be an endless series of chases through futuristic hallways and dark stairwells with Hathaway searching for the bomb.... He should have looked in the projection room.