What is the title of the fourth Indiana Jones film?

The fourth Indiana Jones film is titled Indiana Jones and the Kingdom of the Crystal Skull.

Released in 2008, it follows Indiana Jones nearly two decades after the events of Indiana Jones and the Last Crusade. The story is set in 1957, shifting the series into the atmosphere of Cold War espionage and 1950s science-fiction adventure. Indy is pursued by Soviet agents led by Irina Spalko, who are searching for a mysterious crystal skull in Peru.

Harrison Ford returned as Indiana Jones, with Karen Allen reprising her role as Marion Ravenwood. The film also introduces Mutt Williams, played by Shia LaBeouf, and features Cate Blanchett as Spalko and John Hurt as Professor Oxley.

The title went through several versions during development. Earlier script ideas included The Atomic Ants and Destroyer of Worlds before the filmmakers settled on Kingdom of the Crystal Skull. The film was directed by Steven Spielberg and scored by John Williams, continuing the creative lineage of the earlier entries.