TP decent kicker vs. an unknown (regression in my play?)

[SlantNGo]

Well, I haven't played much in the last three months, and I believe this may be a regression in my play... the table was moderately loose-passive. Villain just sat down.

I was ready to ditch my hand unimproved after the 3-bet from unknown. Looking back on the hand, I think that was a bad idea given the multitude of draws on the flop. On the turn, I picked up the gutshot so I called with many outs to improve. How should I be proceeding after the flop here? I definitely should be showing this down vs. an unknown, right?

By the way, someone disconnected and was all-in on the flop.

Party Poker 0.50/1 Hold'em (8 handed) http://216.119.70.224/converter/hhconverter.pl

Preflop: Hero is MP2 with T[img]/images/graemlins/club.gif[/img], Q[img]/images/graemlins/diamond.gif[/img]. UTG+1 posts a blind of $0.50.
UTG calls, UTG+1 (poster) checks, MP1 calls, Hero calls, <font color="#666666">1 fold</font>, Button calls, SB completes, BB checks.

Flop: (7 SB) 4[img]/images/graemlins/club.gif[/img], 9[img]/images/graemlins/spade.gif[/img], Q[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(7 players)</font>
SB checks, BB checks, UTG checks, UTG+1 checks, <font color="#CC3333">MP1 bets</font>, <font color="#CC3333">Hero raises</font>, Button folds, SB folds, BB folds, UTG folds, <font color="#CC3333">MP1 3-bets</font>, Hero calls.

Turn: (6.50 BB) K[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(3 players)</font>
<font color="#CC3333">MP1 bets</font>, Hero calls.

River: (8.50 BB) 6[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(3 players)</font>
<font color="#CC3333">MP1 bets</font>, Hero folds.

Final Pot: 9.50 BB