It took Walter Hill's "The Long Riders" (1980) to help establish Keach. With his brother Stacy, he co-executive produced, co-wrote and co-starred in this revisionist Western. The film's hook had real-life brothers portraying legendary outlaws: David, Keith and Robert Carradine were the Youngers; Randy and Dennis Quaid were the Millers; Nicholas and Christopher Guest were the Fords; and the Keach brothers played Frank and Jesse James. With an effective Ry Cooder score and stunning visuals, "The Long Riders" received excellent reviews and is considered a minor classic. The film, however, did not jump-start Keach's career. He went on to supporting roles as a motorcycle cop in Harold Ramis' "National Lampoon's Vacation" (1983), Catherine Hicks' husband in John Byrum's misguided remake of "The Razor's Edge" (1984) and gave a snortingly amusing turn as a Gestapo-like traffic officer in "Moving Violations" (1985).
Keach began moving behind the camera. He devised the story for and, with Brian Grazer, produced "Armed and Dangerous" (1986), a low-brow comedy vehicle for John Candy and Eugene Levy. Keach had slightly better luck with his directorial debut, "False Identity" (1990), an uneven murder mystery that starred Genevieve Bujold and Stacy Keach. His sophomore effort, "The Stars Fell on Henrietta" (1995), was a box office disappointment but earned some critical praise. The film detailed the effects of a wildcat oilman (Robert Duvall) on the lives of a young couple (Frances Fisher and Aidan Quinn) in Depression-era Texas.
Keach has had better success in the director's chair on TV. He forged a relationship with the USA network, helming telefilms like the actioner "The Forgotten" (1989) and the mystery "Praying Mantis" (1993). During the filming of the mystery "Sunstroke" (USA, 1992), Keach fell in live with his leading lady, Jane Seymour. They married in 1993 and he has since directed her in episodes of the CBS series "Dr. Quinn, Medicine Woman" and the TV biopic "A Passion for Justice: The Hazel Brannon Smith Story" (ABC, 1994).