Actors rehearsing a show at a mysterious seaside theater are being killed off by an unknown maniac.
| Actor | Role |
|---|---|
 Jenny HanleyJulia Dawson | Julia Dawson |
 Ray BrooksMike | Mike |
 Luan PetersCarol Edwards | Carol Edwards |
 Candace GlendenningSarah | Sarah |
 Robin AskwithSimon | Simon |
 Tristan RogersTony Weller | Tony Weller |
| JJudy MathesonJane | Jane |
| DDavid HoweyJohn | John |
| EElizabeth BradleyMrs. Saunders | Mrs. Saunders |
| RRodney DiakWarner | Warner |
| PPenny MeredithAngela | Angela |
| SSally LaheeIris Vokins | Iris Vokins |
| JJohn YuleGerry | Gerry |
 Raymond YoungInsp. Walsh | Insp. Walsh |
| CCarol AllenLibrarian | Librarian |
 Alan CurtisJack Phipps | Jack Phipps |
 Brian TullyWillesden | Willesden |
| JJane CardewLady Pamela | Lady Pamela |
| TTom MennardFred | Fred |
 Stewart BevanHarry Mulligan | Harry Mulligan |
 Michael KnowlesCurran | Curran |
| KKent BakerMortuary Attendant | Mortuary Attendant |
 Jess ConradYoung Actor | Young Actor |
 Patrick BarrMajor Bell / Sir Arnold Gates | Major Bell / Sir Arnold Gates |