As narrator will Stewart be a disembodied voice booming over the sound system, or at any time will he be visible in the arena and dressed in period costume?
I know you are particularly spoiler-phobic these days, Dietmar. However, I think any information in this regard would qualify as a health warning rather than a spoiler. The sight of Stewart in a toga or other flimsy imperial Roman garb could cause extensive damage to an unsuspecting heart. I wouldn't want half of the London Coven ending up in a cardiac ward on the night of the premiere.