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The body seen plummeting to certain death in chapter six of Secret Agent X-9 was one of Blackstone's (Henry Brandon) men. Baron Karsten (Monte Blue), meanwhile, is kept prisoner by the gang. "Where are you taking me, " a blindfolded Karsten demands to know. "What difference does it make," Maroni (Lon Chaney, Jr.) sneers, "you don't know where you are now." To his dismay, the baron soon comes face to face with what appears to be his own double, but in reality is Victor Brenda in disguise. The phony Baron Karsten accepts the Belgravian jewels from Chief Agent Wheeler (Larry Blake) but X-9 (Scott Kolk) smells a rat and tails the getaway vehicle. The chase, however, comes to an abrupt halt when, in order to avoid hitting Agent Tommy Dawson (Henry Hunter), Pidge (David Oliver) is forced off a bridge.