3 in a Row is a Tic-Tac-Toe-like game only played in the UK version.
The contestant faced a game board of nine numbers, each of which concealed a prize. The contestant picked a number to reveal a prize, then a question about the price of the prize was asked. It could be "true or false" or "higher or lower" if the price shown was wrong. Answering the question correctly won that position on the board. Getting three prizes in a row horizontally (across/side to side), vertically (up and down) or diagonally won the game. The contestant would lose if he/she got uncaptured positions in a row or ran out of possibilities. Winning the game won a big prize.