William Katt as George Loomis

Sean Young as Susan Matthews-Loomis

Patrick McGoohan as Doctor Eric Kiviat

Julian Fellowes as Nigel Jenkins

Edward Hardwicke as Dr. Pierre Dubois

Kyalo Mativo as Cephu

Hugh Quarshie as Kenge Obe

Olu Jacobs as Col. Nsogbu

Eddie Tagoe as Sgt. Gambwe

Julian Curry as Etienne

Alexis Meless as Guide

Susie Nottingham as Baki - Laboratory Assistant

Stephane Krora as Port Captain

Anthony Sarfoh as Village Chief

Jeannot Banny as Killed Soldier

Roger Carlton as Old African

Thérèse Taba as Colleague