Want to do day trip from Paris in October. Had booked a tour through the Caen Memorial at 11 AM on a Sunday and returning to Paris, departing at approx. 7 PM. However, for some reason, the train is not running that Sunday morning (probably work on the tracks). Emailed the tour group, which suggested a weekday date but didn't tell me that the time was earlier (and returning later) than on a Sunday. I booked 2 non-refundable tickets on the Intercites to arrive in Caen at 10:52 AM on a weekday and departing for Paris at 6:57 PM. Then the tour guide emailed me to tell me that we needed to be at the Caen train station by 8:57AM on a weekday and they won't return us to the train station until 7:15-7:30. We could take a taxi to the Memorial museum and catch up with the tour there. They leave for the beaches at 1 PM. However, that doesn't solve the discrepancy in train departure time for return to Paris. Any ideas for dealing with this mess I've made would be most welcome.