“Elvis Presley: The Searcher,” is set to air April 14 on HBO.

It’s a three-hour documentary focusing on the entire line of Elvis’ music, from childhood to final recording sessions in 1976 in the Jungle Room at Graceland.

The documentary will also have more than 20 new interviews with his session players, producers, engineers, directors and other artists who were influenced by the King.

Also views from inside Graceland, never-before-seen photos and footage of items from private collections world-wide. There is also an original musical score composed by Pearl Jam lead guitarist Mike McCready.