Bidding a Little Hand
Any attempt to win the District 13 GNT must go through the powerful team assembled by George Jacobs. 
You have managed to make the finals. After 53 boards of a 60-board match, you pick up a small hand:
6 
T 7 3 
6 4 3 2 
Q J T 9 5.
Your partner opens 2 and your RHO calls 2. You double, showing two queens or less, and partner bids the expected 2 . You have a strong partner, but little partnership experience. (Since Brad Carmichael moved to Kansas City, you needed a replacement on the team that won the event two years ago. Jacob Morgan, a rising star who won over 1000 masterpoints last year has stepped into the big gap left by Brad. Jacob has agreed to play your methods, but his professional obligations left you limited practice time, including only one day of actual play before the event.)
Jacob is pictured with regular partner Marty Harris.
You bid 3 and partner calls 3. You bid 4 and partner now bids 4.
You are facing a tough call here, but you get some unexpected help from RHO, who doubles. It is our view that these calls are rarely correct, but it is the end of a long match. Perhaps RHO did not realize that he would be on lead against any likely contract. Anyway, you have an easy pass and partner now bids 4.
You have an extra bit of information, but what does it all mean? More importantly, what do you call?