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