Episode 5 refers to:
- Series 1: Spot the Difference
- Series 2: Murder Onboard
- Series 3: Political Suicide
- Series 4: Swimming in Murder
- Series 5: Lost Identity
- Series 6: Man Overboard - Part One
- Series 7: Murder on the Day of the Dead
- Series 8: Beyond the Shining Sea - Part One
- Series 9: Switcharoo