sentences:  The play was produced by Brian Lighthill and written by Barry Letts.Paul Darrow, Michael Keating, Steven Pacey, Peter Tuddenham and Jacqueline Pearce reprised their television roles, but Josette Simon and Glynis Barber were replaced by Angela Bruce as Dayna and Paula Wilcox as Soolin.The story was set during the fourth series between the episodes "Stardrive" and "Animals".