1967, they appeared on American television, guest-starring on the variety TV series Malibu U, performing "Light My Fire", though they did not appear live. The band is seen on a beach and Morrison is lip-synching the song in playback. The music video did not gain any commercial success and the performance fell into relative obscurity. It was not until they appeared on The Ed Sullivan Show that they gained attention on television. On September 17, 1967, the Doors gave a memorable performance of "Light My Fire" on The Ed Sullivan Show. According to Manzarek, network executives asked that the word "higher" be removed, due to a possible reference to drug use. The group appeared to acquiesce, but performed the song in its original form, because either they had never intended to comply with the request or Jim Morrison was nervous and forgot to make the change (the group has given conflicting accounts). Either way, "higher" was sung out on national television, and the show's host, Ed Sullivan, canceled another six shows that had been planned. After the program's producer told the band they would never perform on the show again, Morrison reportedly replied: "Hey man. We just did the Sullivan Show." On December 24, the Doors performed "Light My Fire" and "Moonlight Drive" live for The Jonathan Winters Show. Their performance was taped for later broadcast. From December 26 to 28, the group played at the Winterland Ballroom in San Francisco; during one set, in the middle of "Back Door Man", the band stopped performing to watch themselves on The Jonathan Winters Show on a television set wheeled onto the stage. The Doors spent several weeks in Sunset Studios in Los Angeles recording their second album, Strange Days, experimenting with the new technology, notably the Moog synthesizer they now had available. The commercial success of Strange Days was middling, peaking at number three on the Billboard album chart but quickly dropping, along with a series of underperforming singles. The chorus from the album's single "People Are Strange" inspired the name of the 2009 documentary of the Doors, When You're Strange. Although session musician Larry Knechtel had occasionally contributed bass on the band's debut album, Strange Days was the first Doors album recorded with a studio musician, playing bass on the majority of the record, and this continued on all subsequent studio albums. Manzarek explained that his keyboard bass was well-suited