Cast (in credits order)
| Patty Duke | ... | Patty Lane / Cathy Lane | |
| William Schallert | ... | Martin Lane | |
| Jean Byron | ... | Natalie Lane | |
| Paul O'Keefe | ... | Ross Lane | |
| Eddie Applegate | ... | Richard | |
Edit
See also
Release Dates | Official Sites | Company Credits | Filming & Production | Technical Specs