The mother of a missing marketing executive receives a ransom demand via e-mail, a boy goes missing en route to his birthday celebration, and a woman appears to have been kidnapped by a car thief.
A school bus is hijacked by kidnappers who keep upping their ransom demands, a search is carried out for a missing priest in desperate need of a liver transplant, and a woman mysteriously disappears during her fiance's dinner party.
The team searches for a blind girl and her mobility instructor, a hospital worker disappears on a quiet rural road, and the hunt is on for an X-ray technician who feared being abducted by aliens.
Jack, Samantha and Danny track a gunman who shot Martin and left him in a critical condition, a teenager is believed to have gone missing so he can execute a plan to bomb his school, and Elena Delgado has a tricky first assignment as she helps search for a missing prostitute.
The team searches for a man who has abducted a boy, Elena works undercover as an exotic dancer in the hope of solving the riddle of a stripper's disappearance, and a number of people seem to have a grudge against an emergency services operator who has gone missing.
A Sudanese boy disappears from his New York home, a crime-scene cleaner and his teenage daughter vanish, and Jack suspects a TV reporter's disappearance might be connected to her son's torture and death in a Guatemalan prison.
The team searches for a man whose daughter disappeared years previously, a clothing company executive is abducted from a taxi following a rooftop party, and a white-collar criminal vanishes on his way to testify against a former associate.