| Rating | Solver | Clue |
|---|---|---|
| OBSERVATION | Monitoring | |
| SUPERVISION | Monitoring | |
| EKG | Heart-monitoring machine | |
| ECG | Heart-monitoring machine | |
| WATCHDOG | Monitoring organisation | |
| LIE DETECTOR | Machine for monitoring untruthfulness | |
| LIEDETECTOR | Machine for monitoring untruthfulness | |