Real Madrid forward Bale returned to the North London club on Saturday having agreed a season-long loan deal, though he might have been having second thoughts when Danny Ings scored at St Mary's to give another of the Welshman's former clubs a 32rd-minute lead.
However, Son levelled before half-time following a cross from Kane, who then provided another two assists for the South Korean to complete a hat-trick just after the hour mark.
