Steed then goes to the leader of their organisation with George Burton, a fellow spy, "Mother", who is a man in a wheelchair, and reports that the missing Mortimer has been found.
Steed's car is ambushed on the road, and he gets shot with a peculiar device by two men, and Mrs. Peel is taken to "the glass house", where she meets Mortimer again, whose memory has been taken again.
Having decided to cast Linda Thorson as Steed's new sidekick Tara King, producer John Bryce had started filming episodes with the character already in place and - as with her predecessors - no introduction.
However Bryce was fired midway through production of the third episode, and the previous series producers, Albert Fennell and Brian Clemens, were re-hired.
Instead, he decided that there needed to be a continuity explanation for the replacement of Mrs Peel by Tara King, and set about hastily developing a storyline which would account for this.