Couple of good ones there George. Sid James - love it! David Jason could do it too (remember him in Porterhouse Blue"?). Likewise Richardson for Vetinari. Must blow the rest out of the water.

But, no, Schwarzeneger is too capable for Detritus. It has to be Stallone. Schwarzenegger can be the bad werewolf in the one about the fat meteor.

I'm not sure we've got Carrot right yet. Who was the good bodybuilder in "A kid for two farthings"?