A dilemma is presented to a robot on Mercury: self-preservation (The Third Law);or the protection of a human's life (The First Law).
Two space-suited men riding robots, facing forward at right, silhouetted and facing away at left. Thumbnail
| Date | Publication | Publisher | Type | Page | |
|---|---|---|---|---|---|
| 1990 |
|
Robot Visions | Guild Publishing | Collection | 104 |
| April 1990 |
|
Robot Visions | Roc / Penguin | Collection | 123 |
| September 1990 | Robot Visions | Gollancz | Collection | 104 | |
| March 1991 |
|
Robot Visions | Roc / New American Library | Collection | 123 |
| May 1991 |
|
Robot Visions | VGSF / Victor Gollancz | Collection | 104 |
| September 1993 |
|
Robot Visions | VGSF / Gollancz | Collection | |14 |
| February 1997 |
|
Robot Visions | Vista | Collection | |14 |
| April 2001 |
|
Robot Visions | Gollancz | Collection | |14 |
| July 2004 |
|
Robot Visions | Roc / New American Library | Collection | 123 |