I have just popped down to my local mainline station to have a look if this is what happens. I long suspected it was, but only today did I actually see it with my eyes to confirm. I am talking about Gdynia Głowna in Northern Poland. It is built as a through station, with no bays, which would make it not a terminus, however it is the end of the line for all the Intercity services that serve it. Being on the north coast, these all approach from the South. After unloading passengers at the station, the unit continues to the North where the PKP depot is. The train then returns to the station ready for its next run. The main reason for this I think is that many trains are Loco hauled and so disappear off to the depot to have the Loco run around, however (and this is what I went to confirm) the new Pendolinos also do the same. Equally as the main route for all the freight traffic to the port goes through the station, keeping the platforms free for Freight trains to trundle through is pretty important.