- David Warbeck
- Craig Milford
- Laura Trotter
- Joanna Fitzgerald
- Loris Loddi
- Dr. Elliott
- Giorgio Favretto
- Roach
- John Ireland
- Anderson
- Victor Beard
- Inspector Morris
- Sergio Rossi
- Professor Schweikert
- Giorgio Bonora
- Dr. Warmick
- Stefano Mazzitelli
- (as Stephen Masters)
- Alessandra Canale
- Susan
- Pat Starke
- Dr. Janet Stein
- Mauro Magliozzi
- (as Morry Markham)
- Nazzareno Cardinali
- (as Nathan Carlin)
- Fabio Lattanzi
- (as Frank Tazanian)
- Guido Sacchi
- (as Guy Saxton)
- Claudio Coletti
- (as Gary Coletti)
