Spock's Beard are a progressive rock band formed in 1992 in Los Angeles by brothers Neal and Alan Morse. Neal played keyboards and was the lead vocalist, as well as being the primary songwriter before leaving the band in 2002 to pursue a solo career. Alan plays electric guitar. The pair teamed with fellow musicians Nick D'Virgilio (drums) and Dave Meros (bass) and released their debut album, The Light, in 1995. The quartet were later joined by veteran keyboardist Ryo Okumoto. Neal Morse departed in 2002, with D'Virgilio taking over lead vocals until his departure in 2011. The band currently consists of Alan Morse, Dave Meros, Ryo Okumoto, drummer Jimmy Keegan (who had toured with the band since 2002 as live fill-in for D'Virgilio) and vocalist Ted Leonard.

The band plays a brand of progressive rock with pop music leanings (drawing much influence from Yes and Genesis). The band is also well known for their intricate multi-part vocal harmonies (such as those found on certain Gentle Giant songs) and use of counterpoint on cuts such as "Gibberish", "Thoughts (Parts I and II)", "A Guy Named Sid Pt.5: Sid's Boy Choir", "Devil's Got My Throat", and "Afterthoughts."