I searched SNCF for tgv trains going from Paris CDG to Brussels. There is a direct tgv # 9863 which leaves CDG to Brussels at 11:07am and arrives at 12:51pm on March 25, 2012 for 77euro. Another train also leaves CDG to Lillie @ 11:07am but has a different train #5144(cost 26euro) Finally, the train which leave Lillie to Brussels has the same #9863 as the direct train (cost 18euro). Is it true that tvg #9863 and tvg#5144 are the same train? If so, what do I do when I arrive at Lillie? Do I stay in the same seats or will I have to change seats? This is my first time on TVG. Thanks.