Live 2/5 - Top Two with AK on Scary Board

[radioheadfan]

Hero ($500) has A [img]/images/graemlins/spade.gif[/img] K [img]/images/graemlins/club.gif[/img] in the CO. Hero raises to $30 after two limpers. He gets one call from an unknown young asian player ($500) in MP. It goes heads-up to a flop of:

T [img]/images/graemlins/heart.gif[/img] Q [img]/images/graemlins/spade.gif[/img] K [img]/images/graemlins/heart.gif[/img] ($70)

Villian checks. Hero bets $50. Villian calls.

Turn: A [img]/images/graemlins/diamond.gif[/img] ($170)

Villian checks. How much does hero bet here (if anything)?

Also, what is the plan if:

1) Villian calls pot-sized bet on turn then leads for (1/2 - full) pot on river blank
2) Villian min-raises pot-sized bet on turn
3) Hero checks behind turn and then villian leads for pot on a river blank