Feb 9, 2015 - 8:50 AM
Hi chaiseng8,
You're right, you can't catch up with the same train. In Summer, there are three Glacier Expresses per day, so theoretically you could spend one or two hours somewhere and take the next one, but you need a new reservation which is quite pricey. You might as well just travel by the regular trains on the same route.
Arno