Christopher Walken Natalie Wood Robert Wagner

Damning open letter by Lana Wood implores CHRISTOPHER WALKEN to expose ”hateful lies” and reveal what REALLY happened the night NATALIE WOOD died.

Heartbroken Lana Wood is pleading to Christopher Walken to expose the “hateful lies” and reveal the truth – what really happened the night Natalie Wood died!

The National ENQUIRER has exclusively obtained a letter that Natalie Wood’s distraught sister addressed to the Oscarwinning actor – whose testimony could solve the mystery of the screen legend’s bizarre death!

Walken, now 72, appeared with Natalie in the sci-fi film “Brainstorm” and was partying with his co-star and her husband, Robert Wagner, aboard the yacht “Splendour” on Nov. 28, 1981 – the night before Natalie, 43, was found drowned in the waters off Catalina Island, Calif.

And now Lana is appealing to Walken to tell what he knows.

“I’m pleading with you to be the brave forthright person Natalie found you to be … and tell what really happened,” Lana wrote.

But what “really happened” could force Walken to address the bombshell claim that Natalie had attempted to flee the yacht after catching him in a gay clinch with her husband.

Pennsylvania-based interior designer Robin Butillo told The ENQUIRER of how Walken admitted to a close friend that he was in bed with Wagner in the hours before Natalie went overboard.

As The ENQUIRER revealed in a bombshell investigation, Hollywood homicide detectives recently recreated the crime scene on the “Splendour” – and found chilling evidence pointing to Wagner as a person of interest! The investigators flew to Hawaii to address new accusations from the captain, Dennis Davern – whose description of that night specifically implicated Wagner in Wood’s death.

A repentant Dennis provided the authorities with a revised account of that troubled evening, recanting previous testimony and claiming the stars returned to the “Splendour” after a night of drinking. Dennis also claimed to have witnessed a violent struggle between Natalie and her husband that night.

Her bruised body recovered from the water the next morning.

Wagner, 85, has refused to cooperate with the reopened investigation.

Walken hired an attorney, and has reportedly met with detectives at least twice in their new probe.