What actors and actresses appeared in Altered States - 1980?

Here are the main actors and actresses who appeared in the 1980 film *Altered States*:

* William Hurt as Eddie Jessup

* Blair Brown as Emily Jessup

* Bob Balaban as Arthur

* Charles Haid as Dr. George Arbogast

* Thais Smith as Helen Jessup (credited as "Thais")

* Joe Seneca as Dr. Peter Shepherd

* Joe Dorsey as Dr. Abernathy

* David Clennon as Dr. William Haber

* Will Sampson as Shaman

* Casey Siemaszko as Young Eddie (uncredited)

Let me know if you'd like more details on any of the actors!