Directors: Othello, The Magnificent Ambersons, Citizen Kane?

Questions

What did Joseph Bloch invent in 1921?

What did Alfred Nobel’s father, Immanuel Nobel invent?

Who did the voice of the Grinch in the animated version of ‘How the Grinch Stole Christmas?

How many brains does a starfish have?

What word defines the state of not being able to remember the word you want to use?