Josh Way riffs this 1965 Sci-Fi "classic," featuring badly dubbed Russian astronauts, a highly impractical robot named John, and just a hint of Basil Rathbone for seasoning. An excursion to the planet Venus reveals the startling truth - that even in space, boring things are lame.
This iRiff comes with a Video On Demand movie with the riff audio mixed right in, as well as an mp3 of the isolated commentary. The original movie is available on archive.org: http://www.archive.org/details/VoyagetothePrehistoricPlanet
Also from Josh Way: Roger Corman's The Wasp Woman.