Psych-Out

Stoney

Steve Davis

Ben

Elwood

Warren

Pandora (as I.J. Jefferson)

Wesley

Preacher

Plainclothesman (as Gary Marshall)

Greg

Little Girl

Thug (as John Cardos)

The Mother

Little Boy

Arthur (as Robert Kelljan)

Thug's Leader

Landlady

(as David Morick)

Himself

Themselves

Themselves

Thug (uncredited)

Woman (uncredited)

Sadie (uncredited)

Himself (uncredited)

The movie was meant to perform the same function in relation to The Trip (1967). Jack Nicholson had written a script that director Richard Rush thought was too "experimental" for mainstream cinema, so the concept of a 'youth" film based in San Francisco and dealing with flower power and drugs was taken over by other writers and Nicholson did not eventually receive a screen credit for his work, although he took what was essentially the male lead in the picture. But Nicholson wrote the part of Stoney for himself as part of the package.

During the Strawberry Alarm Clock's "Rainy Day Mushroom Pillow" song, the lead guitarist's guitar changes halfway through the song.

Stoney: C'mon, man! Warren's freakin' out at the gallery!

Dave: Reality is a deadly place. I hope this trip is a good one.

Dave: It's all just one big plastic hassle.