The Firesign Theatre (also known as The Firesigns) were an American surreal comedy group who first performed live on Los Angeles radio station KPFK during the mid-1960s.
Publicity photo of Philip Proctor and Peter Bergman.
- wikimedia.org
https://podcast-download.kcrw.com/kcrw/audio/podcast/etc/to/KCRW-the_organist-how_to_be_in_two_places_at_once_the_firesign_theatre_in_the_us_and_vietnam-171214.mp3
Four comedians trained in poetry and psy-ops, Firesign Theatre created dense, album-length art-objects that could take multiple spins to understand. Comedy in the form of abrasive soundscapes that reviewers were as likely to call “frightening” as “funny.” - player.fm 
They produced thirteen record albums and a 45 rpm single under contract to Columbia Records from 1968 through 1976, and had several nationally syndicated radio programs during that period, the most famous of which was Dear Friends - firesigntheatre.com
http://www.archive.org/download/Firesign_Theatre_Podcasting_001/chheads.mp3
Deposed Heads of 1979 - NPR's "Morning Edition" - Firesign Theatre - 1980 - player.fm
They also appeared in front of live audiences, and continued to write, perform, and record on other labels through 2010, occasionally taking sabbaticals during which they wrote or performed solo or in smaller groups - wikipedia
http://www.archive.org/download/Firesign_Theatre_Podcasting_001/spike.rm
Spike Milligan and the Goon Show influence on Firesign - Fools in Space show #6 - Firesign Theatre - Mar 30, 2002 - video clips from Firesign Theatre's XM radio show - player.fm
Firesign Theatre material was conceived, written, and performed by its members Phil Austin, Peter Bergman, David Ossman, and Philip Proctor. The group's name stems from astrology, because all four were born under the three "fire signs": Aries (Austin), Leo (Proctor), and Sagittarius (Bergman and Ossman). They acquired an enthusiastic following in the late 1960s and early 1970s.
One of the group's most popular early albums, the 1970 Don't Crush That Dwarf, Hand Me the Pliers, was added to the National Recording Registry of the US Library of Congress (LOC) in 2005. In the induction, the LOC called the group "The Beatles of comedy."
https://archive.org/download/OTE_20060126_How_Radio_Isnt_Done_16/OTE_20060126_How_Radio_Isnt_Done_16.mp3
How Radio Isnt Done (Episode 16) - archive.org
# See also
* Radio Free Oz
* Recording career
* Reagan Era
* 1990s revival
* Later work
* Media
- Streaming radio - firesigntheatre.com
- Podcasts - player.fm
- Spike Milligan and the Goon Show - player.fm
- Firesign audio on archive.org
Four comedians trained in poetry and psy-ops, Firesign Theatre created dense, album-length art-objects that could take multiple spins to understand.