A chance encounter with two apparently affable strangers in the remote French countryside forces an English couple to confront the dark heart of their fractured relationship.

When a documentary crew traveling through the Amazon jungle, picks up a stranded man, they are unaware of the trouble that will occur. This stranger's hobby is to capture the giant Anaconda snake, and plans to continue targeting it on their boat, by any means necessary.

New York postal worker Jacob Singer is trying to keep his frayed life from unraveling. His days are increasingly being invaded by flashbacks to his first marriage, his now-dead son, and his tour of duty in Vietnam. Athough his new wife tries to help Jacob keep his grip on sanity, the line between reality and delusion is steadily growing more and more uncertain.

After receiving mysterious empty packages inside his apartment, a young computer-programmer (named Simon) begins a personal investigation into their origins. This leads him to discover his odd and eccentric neighbors; an artificially intelligent robot-head, named Adam; a virtual-reality sex game; and a possible corporate conspiracy. As the story progresses, Simon's grip on reality becomes more and more tenuous, while his craving for Nature Fresh milk becomes almost unbearable. Is it all just in his mind, or is something more sinister happening here?

The head of the Green Manors mental asylum Dr. Murchison is retiring to be replaced by Dr. Edwardes, a famous psychiatrist. Edwardes arrives and is immediately attracted to the beautiful but cold Dr. Constance Petersen. However, it soon becomes apparent that Dr. Edwardes is in fact a paranoid amnesiac impostor. He goes on the run with Constance who tries to help his condition and solve the mystery of what happened to the real Dr. Edwardes.

A ship pulls into New York Harbor with no one on board. The police find a cargo full of green pulsating eggs. Upon contact, the eggs explode spreading a green acid like substance that seeps into the skin and explodes. It is later discovered that the eggs are being manufactured in South America by a one-eyed Martian that grew from a tiny seed a former astronaut brought back from a expedition to Mars.