Harry Julius Shearer is an American actor, comedian, musician, radio host, writer, and producer. Born in Los Angeles, California, Shearer began his career as a child actor. From 1969 to 1976, Shearer was a member of The Credibility Gap, a radio comedy group. Following the breakup of the group, Shearer co-wrote the film Real Life (1979) with Albert Brooks and worked as a writer on Martin Mull's television series Fernwood 2 Night.

The Credibility Gap was an American satirical comedy team active from 1968 through 1979. They emerged in the late 1960s delivering comedic commentary on the news for the Los Angeles AM rock radio station KRLA 1110, and proceeded to develop more elaborate and ambitious satirical routines on the "underground" station KPPC-FM in Pasadena, California. Richard Beebe's wife Heidi came up with the name "The Credibility Gap" due to the news being published that seemed to have gaps.