Tony Harding

The cast and crew recall the making of ' The Invisible Enemy' and even take the original K-9 for walkies. With actors Louise Jameson and John Leeson, director Derrick Goodwin, co-writer Bob Baker, visual effects designers Tony Harding and Mat Irvine, K-9 operator Nigel Brackley, and journalist Gary Gillatt.

Visual effects designer Tony Harding and model maker Richard Gregory are reunited with the Malus prop they built for the story. Current owner Paul Burrows is on hand to describe the reality of living with a giant stone monster on the lounge wall.