Keanu Reeves stars as a retired hitman who is forced back into the criminal underworld he had abandoned after his car is stolen and his puppy, a final gift from his deceased wife, is killed. What is the title of this action film series?

The narrative you described perfectly outlines the premise of the acclaimed John Wick (Review) film series. In these action-packed movies, Keanu Reeves portrays the titular character, a legendary hitman who had left his violent past behind. His forced return to the criminal underworld is famously triggered by a tragic sequence of events: the theft of his prized 1969 Ford Mustang and the senseless killing of his beagle puppy, Daisy, a final, cherished gift from his deceased wife, Helen. This deeply personal loss ignites John Wick's furious quest for vengeance, pulling him back into a world he desperately tried to escape.

Interestingly, the original screenplay for the first film, written by Derek Kolstad, was titled "Scorn." However, the title was changed to "John Wick" because Keanu Reeves consistently referred to the project by the character's name, and the studio recognized the marketing potential. The series is notably directed by Chad Stahelski, a former stuntman and Keanu Reeves' stunt double from "The Matrix" films, which contributes to the franchise's distinctive and highly praised action choreography. Reeves himself is known for his intense dedication, performing approximately 90% of his own stunts and undergoing extensive training in various martial arts and tactical firearms handling.

Beyond its compelling revenge plot, the "John Wick" franchise is celebrated for its intricate world-building, introducing audiences to a secretive global underworld of assassins governed by a strict code of conduct and a unique economy of gold coins. The series has garnered significant critical and commercial success, grossing over $1 billion worldwide across its films and establishing itself as a benchmark for modern action cinema. John Wick himself is often referred to by his formidable nickname, "Baba Yaga," or "The Boogeyman," a testament to his legendary status within this hidden society.