The Doctor and Jo escape from Axos but then the Doctor offers the Master a deal; if he helps him repair the TARDIS, they can flee Earth together.
Quest roles:
Richard Franklin(Mike Yates), Nicholas Courtney(Brig. Lethbridge-Stewart), Bernard Holley(Axon Man), John Levene(RSM Benton), Roger Delgado(The Master), Paul Grist(Filer), Donald Hewlett(Hardiman), Royston Farrell(Technician), Peter Bathurst(Chinn)