Turn play with overpair, FD & GS but possibly behind

[ttttt]

What's hero's plan here?

Villain as 59/26/3.5

Cryptologic 1.00/2.00 Hold'em <font color="#0000FF">(5 handed)</font> link

Preflop: Hero is SB with T[img]/images/graemlins/club.gif[/img], T[img]/images/graemlins/spade.gif[/img].
BB checks, <font color="#666666">3 folds</font>, <font color="#CC3333">Hero raises</font>, BB calls.

Flop: (4.00 SB) 6[img]/images/graemlins/heart.gif[/img], 7[img]/images/graemlins/club.gif[/img], 8[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets</font>, <font color="#CC3333">BB raises</font>, <font color="#CC3333">Hero 3-bets</font>, BB calls.

Turn: (5.00 BB) 5[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero ?</font>