Shadows' first screened in October 1978 and written by the creator of Sapphire & Steel, P.J. Hammond.
It stars British television staple Clive Swift as Mr. Devine, a down on his luck magician reduced to playing to rooms full of the bored children of formidable parents such as Jacqueline Pearce (Servalan from Blake's 7), who suddenly finds himself in possession of three magical eggs. Blind to the consequences of his new found luck he embarks on an attempt to relaunch his flagging career.
As you might expect from a writer like Hammond this is a nifty little tale although perhaps a little moralising with an ending that's particularly brutal for a children's show.
Buy it here - Shadows - The Complete Third Series [DVD] - or watch it below