| Series | Number | Date | Title | Setter |
|---|---|---|---|---|
| Listener | 3042 | 08/02/1990 | Double Helix | Adam |
| Weekend | 75 | 10/02/1990 | Occidental Plateau | Corylus |
| Listener | 3043 | 15/02/1990 | One-Time Pad | Swan |
| Weekend | 76 | 17/02/1990 | Ephemeral | Smokey |
| Listener | 3044 | 22/02/1990 | The Labours of Hercules VIII — The Horses of Diomedes | Phi |
| Weekend | 77 | 24/02/1990 | Double-entry | Mass |
| Listener | 3045 | 01/03/1990 | Three by Three | Sabre |
| Weekend | 78 | 03/03/1990 | In Ten Cases… | Phi |
| Listener | 3046 | 08/03/1990 | Misdefined II | Dogop |
| Weekend | 79 | 10/03/1990 | This Month's Order | Piccadilly |
| Listener | 3047 | 15/03/1990 | Y | Calmac |
| Weekend | 80 | 17/03/1990 | Potted Biography | Corylus |
| Listener | 3048 | 22/03/1990 | Stormy Fellows | Klick |
| Weekend | 81 | 24/03/1990 | The Last Shall Be First | Eb |
| Listener | 3049 | 29/03/1990 | Solitaire III | Leon |