The South Korean struck twice in injury time, once at the end of the first half and the second in the dying moments of the game with the score locked at 2-2.
His first came via a penalty that initially saved by Pepe Reina in the Villa goal. However Son was on hand to bundle the rebound home and give Tottenham a 2-1 lead after Alderweireld had scored at both ends within the first half hour.
His second was more characteristic of the bustling forward, as he picked up the ball after a Bjorn Engels mistake and sprinted through the Villa half before slotting home past Pepe Reina.
While the player was being interviewed after the game about his double, Tottenham boss Jose Mourinho popped into frame and trolled him instead about the chances that he missed.
Both men laughed off the jibe and Mourinho left after a fatherly punch to Son's cheek - but his message was clear.
The Portuguese manager expects more from the attacker in front of goal, especially during Harry Kane's injury layoff.
Speaking in his post match press conference, Mourinho admitted as much, stating that while he was happy with the win, his team should have wrapped up the match much earlier owing to the number of chances they had.