How to play this turn?

[newdriger]

Villain is unknown. So, pls comment all streets [img]/images/graemlins/heart.gif[/img].

$50 NL Texas Hold'em - Sunday, September 17, 01:19:37 ET 2006
Table Table 108021 (Real Money)
Seat 5 is the button
Total number of players : 6
Seat 2: bs ( $20.58 )
Seat 5: newdriger18 ( $13.65 )
Seat 1: LCo ( $9.30 )
Seat 3: ohrog ( $25.65 )
Seat 6: zgs ( $19.33 )
Seat 4: p06 ( $11.35 )
zgs posts small blind [$0.25].
LCo posts big blind [$0.50].
** Dealing down cards **
Dealt to newdriger18 [ Ts Ah ]
bs folds.
ohrog calls [$0.50].
p06 folds.
newdriger18 raises [$2].
zgs calls [$1.75].
LCo folds.
ohrog calls [$1.50].
** Dealing Flop ** [ Td, As, 9d ]
zgs checks.
ohrog checks.
newdriger18 bets [$3].
zgs folds.
ohrog calls [$3].
** Dealing Turn ** [ Kh ]
oldphrog checks.
Hero?