Icons of ’60s counterculture, Harvard psychologists Timothy Leary and Ram Dass became estranged until an illness inspired their fascinating reunion.

Krishna Das is on a journey to India to discover legendary spiritual teacher Neem Karoli Baba, through drug addiction and depression, to his eventual emergence as a world-famous Kirtan singer.

In this documentary, “Zappy” Zapolin interviews spiritual gurus, celebrities, and people of various faiths about the relationship between spirituality, religion, and psychedelics—in their beliefs and in their experiences.

The core arc of Ram Dass’ teachings and life: whether as Dr. Richard Alpert, the eminent Harvard psychologist, or as Ram Dass who serves as a bridge between Eastern and…