Ben Packman leaves an old people's home to return to the Welsh mountains.

Dr. Tremayne is an enigmatic psychiatrist running an asylum that houses four very special cases. Visited by his colleague Nicholas, Tremayne explains his amazing and controversial theories as to why each of the four patients went mad.

After her young son accidentally drowns, a woman has a breakdown and is finally placed in a mental hospital. After her release, her husband takes her for a weekend at a secluded country mansion, hoping to help her recover. However, things at the mansion aren't quite what they seem to be, the couple begin to feel an uneasy and oppressive presence, and the mother starts to see things that may, or may not, be hallucinations.

A man makes an unexpected appearance at his younger brother's house in the middle of the night. He needs somewhere to stay and convinces his brother and his wife that he is trouble. Or is he?

Recently divorced career woman Alex Greville begins a romantic relationship with glamorous mod artist Bob Elkin, fully aware that he's also intimately involved with middle-aged doctor Daniel Hirsh. For both Alex and Daniel, the younger man represents a break with their repressive pasts, and though both know that Bob is seeing both of them, neither is willing to let go of the youth and vitality he brings to their otherwise stable lives.