DR. John Lancaster lives in dread of a family secret from his past being exposed, and makes him act in irrational ways, even with his fiancée Joan Wentworth.DR. John Lancaster lives in dread of a family secret from his past being exposed, and makes him act in irrational ways, even with his fiancée Joan Wentworth.DR. John Lancaster lives in dread of a family secret from his past being exposed, and makes him act in irrational ways, even with his fiancée Joan Wentworth.