With the Dragons in cruise control late in the second half, Walker was the catalyst for a thrilling finish when he burst into life with two incredible plays to narrow the gap to four points with five minutes left on the clock.
With his halves partner Adam Reynolds off the field for a concussion test, Walker took on the responsibility to get his side back into the game, scoring a magical solo try with eight minutes to play.
Two minutes later the impossible was starting to look possible when Walker brushed off a tackle and created an overlap before throwing a beautiful looped pass onto the chest of Greg Inglis who made it back-to-back tries for the Rabbitohs as a parochial Dragons crowd was silenced.
However, with the Dragons starting to panic and cough up ball, Lady Luck turned against the enigmatic playmaker, with Walker dropping the ball cold with his side in excellent position to create a try scoring opportunity with just over two minutes remaining.
While that was the big pressure reliever, the Rabbitohs would get the ball with time for one last set only for Walker to drop the ball again, this time in heavy contact.
After riding the highs of two unbelievable moments that got his side back into the game, Walker finished the 80 minutes with a sinking feeling as the Dragons finished the game with the ball and a four point victory.