The Love Boat: A Valentine Voyage (1990)

The ship's bookkeeper accidentally becomes the driver for a trio of jewel thieves. A suspended police lieutenant trails the group onto the boat in disguise. The ship's captain, reclusive since his wife's death, is pushed by his daughter to return to the hotel in Bermuda where the couple originally honeymooned. The new cruise director sets her eyes on a passenger who is a TV star, but another ship employee is interested in her. Doc must care for the pregnant wife of the ship's chief executive.