From the
Radio Times:
5.50 ColourDr Who
starring
Jon PertweeThe MutantsA six-part story
by BOB BAKER
and DAVE MARTIN
Part 4: The Doctor and Sondergaard make an amzing discovery in the caves of Solos. Jo falls into the Marshal's trap.
StubbsCHRISTOPHER COLL
Dr WhoJON PERTWEE
CottonRICK JAMES
KyGARRICK HAGON
Jo GrantKATY MANNING
SondergaardJOHN HOLLIS
MarshalPAUL WHITSUM-JONES
Solos GuardROY PEARCE
JaegerGEORGE PRAVDA
Guard WarriorDAVID ARLEN
VaranJAMES MELLOR
Title music by RON GRAINER
and the BBC RADIOPHONIC WORKSHOP
Incidental music by TRISTRAM CARY
Script editor TERRANCE DICKS
Designer JEREMY BEAR
Producer BARRY LETTS
Director CHRISTOPHER BARRY