Two American girls go on a vacation to England and mysterious things begin happening when one of them falls to her death from atop a monument.
| Actor | Role |
|---|---|
 Lynda Day GeorgeCathy More | Cathy More |
 Peter JeffreyDexter | Dexter |
 John CarsonArthur Lewis | Arthur Lewis |
 Colette O'NeilAlice Lewis | Alice Lewis |
 Bernard HolleyPaul Eastman | Paul Eastman |
| RRichard CorbetReeves | Reeves |
| KKathleen MalloryJane Howard | Jane Howard |
| JJohn LineDavis | Davis |
 Molly WeirMiss Pendy | Miss Pendy |
| KKevin BrennanParminter | Parminter |