Steed and Mrs. Peel are given an assignment with a difference - they are to observe at a peace
conference, but for once it is not in Britain. In fact, it is being held in Spain, in Tarragon a
place near Zaragoza, and the two agents look on the trip as something approaching a holiday. However,
what they don't know is that a man called Arcos is waiting for them, or more precisely Steed. Arcos
and his co-conspirator Markin have developed a process to literally mould a man's features into
those of someone else, and Steed is the man whose features they are copying.
Steed and Emma get to their hotel in Spain and are settling in when Steed gets a call from Captain
José of the Spanish Secret Service. Steed gets a taxi to go to José's address, but the telephone
call was a hoax, and the taxi is driven by Arcos who kidnaps Steed. Arcos and Markin need Steed's
face to make the face mould that they will use on one of their agents. This man will infiltrate
the peace conference posing as Steed and plant a bomb in the chairman's gavel to destroy the
conference. Meanwhile, Steed will be held prisoner in a chamber under a nearby bullring until the
job is done, and then killed. Back at the hotel Mrs. Peel has made friends with another hotel guest,
Baron Von Curt, and is drinking some wine with him when the real Captain José turns up and asks to
see Steed. They realise that the 'phone call was a hoax and that Steed is missing.
When Arcos was born, they threw away
the mould. So he made some more...
Back at the bullring, Steed attempts to escape but doesn't succeed, so he spends some time making up
the identity kits for all five of the agents that Arcos has chosen to impersonate him. Steed hopes
that all five will attempt infiltrate the conference, causing confusion and alerting security that
something is going on. Mrs. Peel gets Von Curt to take her to see Mother to tell him of Steed's
disappearance, then goes back to the hotel. At that same hotel one of Arcos' agents, Nadine, gets
his identity kit (as do the other four agents around the town). Nadine uses the kit but something
goes wrong and he dies, with only a half formed face. Emma sees the body and thinks it is Steed but
Captain José confirms that it is not.
The conference begins and three of the four disguised agents turn up as Steed. The first to arrive
quickly kills the other two thinking that at least one of them is the real Steed. Mrs. Peel and the
Baron turn up at the conference (the house hosting it actually belongs to the Baron, who has lent it
to the Spanish authorities) and meet up with Captain José, who tells them that Steed is already
there. Then they find the two bodies - both seeming to be Steed - and realise they are duplicates.
José gives orders that anyone resembling Steed is to be shot, reasoning that the real Steed is dead.
However, the real Steed is far from dead and has finally managed to escape, taking a taxi to the
conference. There he runs into the fourth agent and manages to dispose of him. The surviving agent
has managed to place the bomb in the gavel and escapes, but the real Steed manages to break into the
conference and escapes with the gavel-bomb. Mrs. Peel finds Steed outside, and after establishing that
it is really him, agrees to find Arcos' H.Q. As she gets her car the last fake Steed attacks her,
but is despatched by Baron Von Curt, enabling Steed to return to the bullring, with Emma and the
Baron in close pursuit, although Emma is still not convinced that Steed is the genuine article.
At the bullring, Arcos' men try to stop them and as the battle rages, Steed is in the underground
chamber. He confronts Arcos, who has become a clone of Steed himself. Steed shoots Arcos in the
struggle, but Arcos escapes - only to be shot dead by Markin outside, who thinks Arcos is the
real Steed. Markin is then dealt with, and Steed is reunited with Mrs. Peel and the Baron.
Later, Steed and Emma grab some time to sunbathe - back in Steed's flat in London!