First broadcast 12th April 1986
On the trail of a killer, Tessa and Fred infiltrate a group travellers assembled for a ritual involving prehistoric stones.
Dorothy Ford - Shirley
Trevor Byfield - Harris
Leslie Ash - Fred
Tracy-Louise Ward - Tessa
Matthew Aldridge - Policeman
Jill Gascoine - Maggie Forbes
Don Warrington - Nigel
Peter Jonfield - Lawson
Lesley Nightingale - Lucy
Isabella Marsh - Lucy's Baby (as Isabella Nightingale)
Gary Olsen - Colin
Matthew Scurfield - 1st Cop
Simon Rouse - Seth
Gary Whelan - Watts
Gavin Richards - Quist
Nickolas Grace - Jamie Leydon
Penny Downie - Barbara Dashley
Bibs Ekkel - Russian
Peter Capaldi - Caldicott
