In this question, Mark Mayo's answer (see "Option 1") includes a CityNightLine overnight train. Can any portion of that trip be covered by a Eurail pass?
For reference, the whole trip is:
Eurostar & City Night Line sleeper train: Hop on a mid-afternoon Eurostar from London to Paris and take the excellent City Night Line sleeper train from Paris to Berlin arriving next morning.
Your whole trip is covered by the Eurail pass, but you should pay for reservations.
If you go to the website for Eurail pass, there is a page specifically for international trains. For the Eurostar from London to Paris, you must reserve a seat. In 2nd class, it is worth 89 euros.
On the page for night trains, it says that CityNightLine trains are accessible, but you must reserve a seat/berth. For example, a berth in 2nd class with a Global Eurail pass costs 27.5 euros.
