The 13th episode of Chocky airs on Thames Television, beginning the series’ third season under the title Chocky’s Challenge. 
A year after they met, Matthew and Albertine remain in touch with one another, and with Chocky. Albertine has completed a degree at Cambridge, a degree she cannot legally collect for another two years. She elects to remain at Cambridge to do undergraduate studies in astrophysics, which gives her access to a radio telescope array. Chocky gives Albertine the coordinates to locate her home planet; a signal from Chocky’s home planet replies. When Albertine announces this fact to the board of professors who must approve her research proposal, she is met with laughter…until Chocky reveals herself to them.
written by Anthony Read
based on characters created by John Wyndham
directed by Bob Blagden
music by John Hyde
Cast: Prentis Hancock (Arnold Meyer), Anabel Worrell (Albertine Meyer), James Hazeldine (David Gore), Andrew Ellams (Matthew Gore), Richard Wordsworth (Professor Ferris), Kristine Howarth (Professor Wade), Illona Linthwaite (Dr. Liddle), Roy Boyd (Professor Draycott), Leon Eagles (General), Joan Blackham (Mrs. Gibson), Glynis Brooks (Chocky)
LogBook entry by Earl Green