The Family Strikes Back is a 1986 Hong Kong action comedy film produced, directed by and starring Dean Shek.

Professor Kiu (Roy Chiao) is a mad scientist who developed mental disorders from grieving the death of his son.

Police inspector Uncle Wah (Cho Tat-wah) had sent his subordinates to gather evidence in the vessel, but failed to find any.

On the other hand, Uncle Wah discovers Shek's resemblance to a Japanese scientist named Toyota, who colluded with Kiu.

Wah formulates a plan for Shek to act undercover as Toyota in order to gather evidence from Kiu's lab.