The Afrit Affair

JOHN STEED RECEIVED THE FIRST WARNING MESSAGE WRAPPED IN A PIECE OF KIPPERED HERRING:
I WILL STRIKE WHEN AND WHERE I DESIRE, SIGNED: THE AFRIT
THE SECOND WAS SQUEEZED OUT OF A TUBE OF TOOTHPASTE:
THE AFRIT STRIKES. TRY AND STOP HIM!
Stranger and stranger things began to appear: giant footprints of a monster, murderous flying anvils, one-eared corpses, ticking bombs in the basement. Steed and Emma Peel hastened to discover the Afrit's identity -- before he made his final strike....