Ultimatum (1973 film)

Ultimatum is a 1973 British thriller film directed by Peter Graham Scott and starring Richard Beckinsale, Suzanna Leigh, and Patrick Allen.

The film centers around a naval officer, Lieutenant Commander Chris Turner (Richard Beckinsale), who discovers a coded message hidden inside a chess set he bought at an antique shop. He soon finds himself caught up in a web of espionage and murder as he tries to decipher the message and uncover a dangerous plot.

The plot involves stolen naval secrets and a group of ruthless individuals willing to stop at nothing to retrieve them. Chris Turner, with the help of a female journalist (Suzanna Leigh), must race against time to expose the conspiracy and prevent a national security breach. Patrick Allen plays a key role in the unfolding drama, though the specifics of his character depend on the film's twists and turns.

Ultimatum is considered a suspenseful and engaging thriller, characteristic of British cinema from the 1970s. While not a blockbuster, it's a solid example of the genre, featuring a compelling plot and strong performances from the cast.