Not part of the ranking but listed to get us in the mood.

1967 The Living Dead (1967) - Mandy McKay

She plays the malevolent "Mandy McKay" in "The Living Dead" (episode 5-7), a Luna Lovegood type airhead who turns out to be a lot more than she seems. On the short end of another of Mrs. Peel's classic catfights, Mandy benefits from a tight military style costume with submachine gun, wide pistol belt, boots, gloves, and helmet. Emma finally subdues her with some carotid artery pressure, and the camera gives us a series of nice close-ups of Mandy's beautiful face and eyes as she slips into unconsciousness. Most erotic sequence of the series.

Turner played both "The Receptionist" in "The Girl from Auntie" (episode 4-17) and Miss Pegram in "The £50,000 Breakfast" (episode 6-3). These were made roughly two years apart, Turner was 30 in the first one and aged considerably in those two years - scary the amount of change but it happens.

The Receptionist was probably the kinkiest Villainess of the show, first appearing in a super tight short dress, her legs resting on her desk, and a gun on her lap. Later a caged Mrs. Peel is able to turn the tables on her; forcing her to drop her whip and then pinning her head between the bars of the cage - IMHO the sexiest moment in the entire series.

Miss Pegram was a brittle and utterly ruthless businesswomen who gives Mrs. Peel her best fight and ends up handcuffed and dragged across the room. Not the sort of eroticism often seen on 1967 television.

A bit of a surprise ranking. At age 23 she played the young "Bride" bomber in "A Funny Thing Happened on the Way to the Station" (episode 5-13). There was something so delightfully wicked about her stretched out across the train seat in her bridal gown, explaining the workings of the bomb she was planting in the Prime Minister's rail car. Followed by a suspenseful set up and nicely edited fight with Mrs. Peel in their train compartment. Now in a tight sweater showcasing her talents, the Bride ends up unconscious in the overhead luggage rack of the compartment, sensuously groaning as she shifts position. I can't get in a train compartment without thinking of these two scenes.

There is also an uncredited blonde (Juliet Harmer?) in this episode, who comes at Emma with a fork in a nicely staged sequence; giving the viewer two entirely separate catfights in the same episode.

The sexiest of Tara King's foes, Kate appears as "Lisa" in "Stay Tuned" (episode 7-22). The future scream queen gives Tara her best fight and ends up bound and gagged, with several nice "in distress" close-ups. As in 'The Girl from Auntie", the erotic thrill is heightened by a reversal of positions dynamic with the captive getting the better of her nasty female captor; creating a sizzling degree of humiliation. The hard-faced O'Mara had nice talents which were advantageously displayed in a short tight blue dress.

Played athletic "Holly Trent", the title character in "The Master Minds" (episode 4-6). Haines looked a bit like Princess Anne, but she had a great body and obviously people found her quite fetching, she was Michael Caine's first wife.

Holly is the games' mistress at a school for high intelligence adults, her surprisingly high ranking on this list is because she is the most successfully duplicitous character in the entire series. She does a sexy stretching bit in the gym for Steed's benefit and later battles a shadowy Emma behind a movie screen, eventually crashing through the screen and landing semi-conscious next to Steed. I'm not entirely sure why this has so much sizzle although I suspect that it has something to do with her stunned expression as she slips into unconsciousness.

Played criss-cross murderess "Barbara Wakefield" in "The Murder Market" (episode 4-7). Although this character and her episode had all the elements properly packaged, the characterization came off strangely sterile and the fight sequence horribly clumsy and poorly edited - with the use of a stunt double far too obvious. The episode does feature a nice sequence of Barbara in riding costume. Although the characterization does not generate the erotic energy that it should, I can't keep it out of the top 10.

The episode goes out with a great close-up of her draped semi-conscious on Stead's shoulder, courtesy of Mrs. Peel. Recently I have grown more and more appreciative of this image, so Suzanne's list position is on the rise.

At age 22 she played schoolteacher "Jill Manson" in "The Town of No Return" (episode 4-1). A noteworthy episode if you like girls with glasses and librarian types who transform into dangerous babes. In an early scene Miss Manson seems to be giving Mrs. Peel a lot of suggestive tongue action as she licks her lips throughout their conversation in the school. In the climatic scene a more trendy dressed Jill has a lengthy fight with Emma which culminates in an close up of the young villainess sprawled unconscious on the floor.

If you find Harmer appealing then check out the uncredited blonde who takes a fork to Mrs. Peel in the "A Funny Thing Happened On The Way To The Station" episode; as the two actresses have much the same look.

Played the tight-lipped "bad nurse" "Hilda" in The Correct Way to Kill" (episode 5-9). A surprisingly high ranking as she does not have a great deal of screen time. But what a gorgeous face and what a stylish way she is dispatched by Mrs. Peel. The viewer is left to fantasize about a stripped of her fencing costume Hilda, shoved unconscious into a locker in the changing room.

A year later Joanna would play good girl Pandora Marshall in "All Done With Mirrors" (episode 7-8). It is a bigger part with lots of nice close-ups, but unfortunately without the bad girl sizzle. This was easily Linda Thorson's "hottest" episode and well worth checking out.

Played the main secretary-assassin Sara Penney in "How to Succeed.... at Murder" (Episode 4-25). Next to Maria Machado (see below) the best physical specimen ever cast for an appearance in the series, Sara faced off against Steed, not against Mrs. Peel. In a memorable sequence Steed places her on his lap and tickles her into revealing the location where Mrs. Peel is being held. Sara is wearing tight leather pants and boots, and to the delight of 1960's viewers twists about revealingly in reaction to Steed's molestation. Later Emma gets to take on a whole group of leotard clad secretaries, depositing them one-by-one at Steed's feet, unconscious. Not the most plausible of her action sequences but a nice bonus for those watching the episode.

Played catlike PURR beauty "Angora" in "The Hidden Tiger" (episode 5-8). British version of Lee Purcell and that is a good thing. Absolutely glows with suppressed erotic energy wrapped in a high class package. Nicely vanquished by Emma and shoved into the back of a van. High voltage.

Appears as frumpy cleaning lady "Martha" in "Love All" (episode 7-21). Martha is something for everybody as she is able to transform herself from the mega-plain Martha to her glamed-up neice with a little make-up and a few wardrobe flourishes. I assume it is the same actress since only Veronica is credited, but I've never been entirely certain.

Tara didn't get many hot villainess's during her one season, but "Circe Bishop" in "Take-Over" (episode 7-30) does rank near the series' top ten. Circe is simply delectable and would rank higher except for an extremely lame fight sequence, done almost entirely in wide master shot, where Tara too easily subdues her.

Played secretary-assassin Gladys in "How to Succeed.... at Murder" (Episode 4-25). Gleefully murders her boss and is then delightfully duplicitous when interviewed by Emma. When Emma takes on the whole group of leotard clad secretaries, Gladys is the first one she deposits unconscious on the gym floor. Initially you overlook her for the more flashy secretaries, but Cunningham is a far better actress and conveys a subtle eroticism that makes Gladys more appealing with each viewing.

Another bad nurse, in "My Wildest Dream" (episode 7-28). Nurse Janet Owen has a thing about car doors and hypos. If that is your idea of a good time you will enjoy her appearance.

Busty blonde German actress who played Russian Alicia Elena in "Two's a Crowd" (episode 4-12). Best physical package in the entire series. Many wardrobe and hairstyle changes plus enormous talents. Needs a seduction sequence or at least a little hand-to-hand with Mrs. Peel. Unfortunately she is only decorative although nicely showcased in many sequences. She does manage an appealing look of distress in her last sequence.

Played head girl "Emily" in "Invasion of the Earthmen" (episode 7-16). By this point we have gotten to the "what they had" and "what they should have done with it" stage. The nasty Emily bossed around the other students at Alpha Academy, and seemed to be nymphet material for headmaster Brigadier Brett, who gives her the occasional lustful glance. For her part she fills out her tight sweater quite nicely and looks quite fetching in the school's space age costume of skirt and black boots. But no effort is made to involve her in any action nor to go anywhere with the erotic potential of the story. Given that this is otherwise the most listless episode of the entire series, a little erotic sizzle would have been a refreshing development.

Played Oyuka, a black belt and bad-tempered martial arts trainer in "The Cybernauts" (episode 4-3). Technically not a villianess she underestimates Mrs. Peel and is humiliated in front of her Sensei and his other students. It sounds better than it actually is because their fight is over in seconds.

Katherine was one of the most spectacular British actresses of the 1960's and was especially memorable playing Greti in "The Death Game" - Episode 5-17 of "The Saint", a stern Germanic taskmaster in a red body suit with black boots and belt.

1967 The Death Game (1967) - Greti http://www.imdb.com/title/tt0693517/?ref_=nm_flmg_act_28

Played rich young horsewoman "Miss Beryl Snow" in Silent Dust" (episode 4-14). I may be more favorably impressed because I used to work with someone with a close physical resemblance. Miss Snow does a very convincing flirtation with Stead and there is some potential for more off-camera fantasizing as you imagine Emma stripping her of jodhpurs and jacket.

Appeared as dance instructor Lucille Banks in "Quick-Quick Slow Death" (episode 4-19). Near the end of her career but still had considerable vamping qualities. Proves a disappointingly inept adversary for Emma at the end but at least it is done stylishly. Eunice was the drop dead gorgeous brunette James Bond found when he returned home at the start of Dr. No; when Ursula Andress appeared later in the film she was a bit of a disappointment in comparison. Add four apparently very tough years and twenty pounds for this "Avengers" appearance.

Played conniving wife Ruth Boardman in "Dial a Deadly Number" (episode 4-10). A smoldering hot portrayal with a very high end but sexy wardrobe ultimately leads to very little. The episode also features the unzipping of Emma's leather costume by a male villain. Making this one of the more erotic episodes even without much follow through from Ruth.

Played Russian agent Elena Vazin in "The See-Through Man" (episode 5-4). A little high mileage to rank high on this list but she does have a very convincing fight with Mrs. Peel.

Played sexy Nurse Jill in "Requiem" (episode 7-29). Doesn't do anything especially bad or get much screen time, but makes a good decoration. Katya was two years away from her signature role in "A Clockwork Orange" as the girl in Alex's Ascot fantasy.

Played a twisted Twiggy lookalike in "The Joker" (episode 5-15). The Ola Monsey-Chamberlain character had one of the best names in the series and some endearing manic qualities. But neither her costume nor her dispatch was particularly erotic.