Breach

"Deep in space they are not alone."

Summary

A hardened mechanic must stay awake and maintain an interstellar ark fleeing the dying planet Earth with a few thousand lucky souls on board... the last of humanity. Unfortunately, humans are not the only passengers. A shapeshifting alien creature has taken residence, its only goal is to kill as many people as possible. The crew must think quickly to stop this menace before it destroys mankind.