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 batch 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. It has been shown at many film festivals since.