We will be in Lisbon for a day (arriving by cruise ship). Since we have been there several times, we would like to take the train and see Cascais for a few hours. We once took a train from Cascais to Lisbon, but don't remember where the Lisbon station was located relative to the cruise terminal.

You take the train to Cascais from Cais do Sodre Station which is at Rua de Alacrim (turns into Misericordia). Any cab driver knows his way there.