Blue Sunshine is a 1978 American horror film written and directed by Jeff Lieberman and starring Zalman King, Deborah Winters, and Mark Goddard. The plot focuses on a series of random murders in Los Angeles, in which the only common link between the perpetrators is a mysterious strain of LSD that they had all taken years prior. Over the years, the film attracted a cult following, and was released on special edition DVD by Synapse Entertainment in 2003.