Misc: who played in the movie oscar?

Questions

who, in an effort to prove the danger of using ac (alternating current) in homes, carried out experiments where he electrocuted dogs with ultra-high voltages?

who is credited as the 'father of alternating current'?

who has presented his weekly radio monologue 'letter from america' for the bbc without a break since march 1946?

what is dr death's real name (he's a euthanasia facilitator)?

what does tnt stand for?