By Joan Aiken , dramatised in four parts by Eric Pringle. 1: Where Have All the Children Gone?Sent by King Richard IV to search for his missing son, young Is Twite takes the Playland Express to the north of a divided England. with John Hartley , Gordon Reid , Rachel Atkins. Alastair Danson , Robert Harper , Gerard McDermott , Anthony Ofoegbu , Leila Campbell and George Maguire Music by Neil Brand. Director David Blount