Problem Child (1990)

Meet Junior, a mischievous seven-year-old orphan adopted by Ben and Flo Healy, in this family comedy. Junior turns their lives upside down, leaving a trail of destruction in his wake. Unbeknownst to them, Junior's pen pal is notorious serial killer Martin Beck. When Beck kidnaps Junior and Flo, it's up to Ben to embark on a rescue mission to save his unconventional family from imminent danger. Get ready for a wild ride full of laughs and unexpected twists in this comedic rescue adventure.