The fifth volume of lost episodes of the Avengers featuring John Steed (Julian Wadham) and Doctor Keel (Anthony Howell) offers four more adventures from that mostly lost first season of the 1960s classic.

In, “Nightmare,” a researcher who is one of Dr. Keel’s patients disappears and Keel impersonates him while a search is made to find the missing man. Keel finds himself the target of gangsters who want to make use of his patient’s research in psychological drugs. Overall, a pretty standard crime drama story that’s reproduced in a way that feels completely authentic to the era. I do wonder if the original screen version might have made the psychotropic drugs used feel more trippy which would have added to the period feel.

“The Girl on the Trapeeze” is a rare Steed-free episode as Dr. Keel appears to witness the suicide of a woman who he remembers from somewhere. A magazine picture leads him to a circus where a big secret is being hidden. It’s a nicely done mystery with some great moments between Keel and Carol.

“Crescent Moon” features Steed going to the Caribbean to investigate the kidnapping of the daughter of the late dictator of an island. It’s very well-done multi-layered story with a lot of great guest characters. At first, it appeared that, following the previous Steed-free story, we were going to have a story without Dr. Keel, but he ends up appearing in the second half of the episode and plays an interesting role in the denouement without ever leaving England. This has actually been my favorite lost episode so far.

Finally, “Diamond Cut Diamond” finds Steed going undercover as an Australian Airline steward to bust a diamond smuggling racket. It’s a solid and well-paced adventure even though it’s very similar to many earlier stories in the Avengers series. Okay, but not remarkable.

Overall, this collection is enjoyable and has a more solid sense of identity than many of the earlier sets partially because the original 1960s writers had a better sense of what they wanted the Avengers to be as well as the fact that Big Finish is very comfortable with these characters.

While there’s no “Making Of” extras on this CD, there’s a tribute to the late Patrick Macnee from the writers and cast. It adds a touch of class to an already very classy release.

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