An educational film about the perils associated with sexually transmitted diseases (STDs). The drama is interspersed with scenes of a medical adviser directly addressing the camera giving advice and information about STDs.
| Actor | Role |
|---|---|
 Eric DeaconMick | Mick |
| VVictoria WilliamsJenny Peterson | Jenny Peterson |
| MMartin SkinnerColin | Colin |
| RRobert CottonDon | Don |
 Nicholas YoungRaymond | Raymond |
| PPeter Vaughan-ClarkeRobbie | Robbie |
 Rula LenskaRita | Rita |
 Richard MathewsMr Ramlin | Mr Ramlin |
 Rosalind KnightMrs Ramlin | Mrs Ramlin |
 Sue HoldernessChristine | Christine |
| BBernadette MilnesMrs Peterson | Mrs Peterson |
| CCatherine CreweMiss Harris | Miss Harris |
| FFreddie EarlleGon | Gon |
 Bernard HillSyph | Syph |
 Jonathan AdamsHenry VIII | Henry VIII |
| VVeronica DoranQueen | Queen |
 Christopher BigginsApothecary | Apothecary |
| DDave Carter1st Workman | 1st Workman |
 Graham Ashley2nd Workman | 2nd Workman |
| MMonica BufordDancer | Dancer |
| VVirginia RudennoGirl at Party | Girl at Party |
| KKen BingePeter | Peter |
| DDr. R.D. CatterallHimself | Himself |