1956/57 - This episode reflects the Kim Philby spy affair.
| Actor | Role |
|---|---|
 John StandingJohn Tallwatch | John Tallwatch |
 Anthony BateFenwick | Fenwick |
 Jessie MatthewsNanny Webster | Nanny Webster |
 Jill DixonAnne Tallwatch | Anne Tallwatch |
 Milos KirekRostrovitch | Rostrovitch |
| JJohn LineKalgunin | Kalgunin |
 David FirthIan Phillips | Ian Phillips |
| GGraham RoweWoods | Woods |
| AAnthony NashMasters | Masters |
| AAntony WebbDr. Rimmer | Dr. Rimmer |
 Stephen ChurchettSmithson | Smithson |
| JJohn GolightlyFildes | Fildes |
| WWill StampeCommissionaire | Commissionaire |
 Philip VossNewsreader | Newsreader |
| IIan BarrittCID Man | CID Man |