Ensign Lian T'Su was a relief operations officer aboard the USS Enterprise-D in 2364. T'Su relieved Data from his post as operations officer when he beamed down to Minos in order to investigate the disappearance of the USS Drake. She remained at the operations station when Lieutenant junior grade Geordi La Forge took over the command of the Enterprise-D and Captain Picard also beamed down to Minos. Ensign Lian T'su was played by actress Julia Nickson. She was five months pregnant at the time of filming. Lian T'Su