The epilogue states that The Creeping Terror was featured on Mystery Science Theater 3000 in 1993, but that episode first ran on September 17, 1994.
The Creeping Terror (1964) was in production from 1962-1964, when Charles Manson was in federal prison. Manson was not released until 1967 and did not live at the Spahn Ranch until he and his "family" were evicted from their San Francisco living quarters in 1968.