Brian Cox can pull off menacing and acerbic like few others (the Bourne movies, Manhunter). He legitimizes terrible movies (Chain Reaction, The Long Kiss Goodnight). But his best role to date is teaching Shakespeare to adorable children.
Watch as he teaches a toddler the "To Be or Not to Be" soliloquy from Hamlet. Watch your back, Kenneth Branagh, this kid's comin' for you.