50nl FTP - Reraised pot, but he checks behind flop?

[Leviathan101]

Full Tilt Poker
$0.25/$0.50 No Limit Hold'em Ring Game
6 Players
LegoPoker Hand Converter

<font color="black">Stack Sizes</font>
UTG: $79.05
MP: $65.85
CO: $48.50
BTN: $79.05
Hero (SB): $51.95
BB: $20.25

<font color="black">Preflop:</font> 3[img]/images/graemlins/spade.gif[/img] 3[img]/images/graemlins/heart.gif[/img] ($0.75, 6 players)
UTG folds, MP calls $0.50, CO folds, BTN folds, <font color="red">Hero raises to $2</font>, <font color="red">BB raises to $4.50</font>, MP folds, Hero calls $2.50

<font color="black">Flop:</font> 8 7[img]/images/graemlins/spade.gif[/img] 2[img]/images/graemlins/spade.gif[/img] ($9.5, 2 players)
Hero checks, BB checks

<font color="black">Turn:</font> 8 7[img]/images/graemlins/spade.gif[/img] 2[img]/images/graemlins/spade.gif[/img] [T[img]/images/graemlins/heart.gif[/img]] ($9.5, 2 players)
Hero ...

Villian is unknown, which makes it harder, but what checks behind flop besides whiffed AK, AQ? Am I good here? Best line to take is...