The tenth episode of Chocky airs on Thames Television. Prentis Hancock (Space: 1999) guest stars. 
Matthew is alarmed when an American scientist visits Albertine and her father, and tells them he’s studying the nature of genius and wants to conduct a few unintrusive tests on Albertine. Matthew warns Albertine about what happened to him a year before, and introduces her to Chocky. This convinces her to run away and hide, which upsets her father. Matthew knows where she’s hiding – a hiding place she had shown him while playing – but even there she isn’t safe.
written by Anthony Read
based on characters created by John Wyndham
directed by Vic Hughes
music not credited
Cast: Andrew Ellams (Matthew), Anabel Worrell (Albertine), Angela Galbreath (Cissie), Prentis Hancock (Meyer), Ed Bishop (Deacon), Michael Crampton (Luke), Glynis Brooks (Chocky’s voice)
LogBook entry by Earl Green