If you look on the Cunard page for this specific cruise, it shows the 3 'lecturers' as :-
Robert Smolik - American Diplomat
Susan Humphries - Geophysics
William M Fowler - Maritime
I must say I am not looking forward to this set of lecturers, they all seem very 'heavy going' re their areas of expertise. No doubt they will be presenting, sorry 'giving lectures', on their specialist subjects. I expected at least one to be 'lighter' in their subject matter, but I suppose this is the QM2 after all.