They re-formed in the mid-70s, with a new line-up of Ron Bushy and Eric Brann joined by bassist Phil Kramer and Howard Reitzes delivering two disappointing albums. A very brief semi-reunion in 1978, enlisting Jimi Henderson on vocals and bassist Keith Ian Ellis, imploded during a tour of Germany, when Ellis was found dead in a motel room.
Ten years later, all of the original members got together for the Atlantic Recording Corporation's 40th anniversary concert and celebration, appearing on stage along with the surviving members of Led Zeppelin, and with Aretha Franklin among many other acts of the company's roster.
Another re-formation, this time in 1992, was masterminded by Mike Pinera. A new version of 'In-A-Gadda-Da-Vida' was recorded and Pinera recruited Dorman and Bushy for extensive touring in the USA.
By 1993, the legendary "In-A-Gadda-Da-Vida" album had sold an astonishing 25 million copies and in 1995, the band re-formed once more for an anniversary tour.
On February 12, 1995, bassist Phil Kramer, who took Lee Dorman's place when Iron Butterfly re-formed in 1975, disappeared after calling police and threatening suicide. He was never heard from again, which led to a massive search and many news reports, talk show topics including an episode of Oprah, and even a segment on Unsolved Mysteries some years later. His body was found in a canyon in the Santa Monica Mountains, on May 31st, 1999, over four years later. At the time of his death, he was 42.