Carolan

Lieutenant Commander Carolan served as transporter chief onboard the USS Challenger. He was originally to serve as the ship's second officer, a position that was given to Geordi La Forge when he was temporarily assigned to the Challenger. Carolan would serve as first officer of the ship when La Forge was field-promoted to captain and given command of the Challenger, with Captain Montgomery Scott having to step down due to health issues and Commander Tyler Hunt, the ship's original X.O., was killed in action.