- Best Known for the Fanservice:
- The series is credited with popularising kinky boots as a sexy fashion statement. Patrick Macnee and Honor Blackman even recorded a song called "Kinky Boots".
- Diana Rigg's Spy Catsuit is quite famous, even if she switched to a less fanservicey outfits so she could actually do her stunts.
- The episode "A Touch of Brimstone" is remembered for featuring Mrs Peel in a sexy leather bustier, even getting censored in America for this reason.
- A now defunct fansite happily listed the episodes "Immortal Clay", "Mr Teddy Bear" and "Castle De'ath" as the ones where Steed goes shirtless.
- Die for Our Ship: Tara King gets more Ship Tease with Steed than her two predecessors, thoroughly angering those who shipped Steed with Cathy Gale or Emma Peel.
- Growing the Beard: The series grew some stubble when John Steed was promoted to main character after a season of being the sidekick to Dr. David Keel and the amazonian Cathy Gale became Steed's partner, and a full beard when Emma Peel became his new sidekick. People tend to assume Steed and Peel were the only lineup the show ever had even though they weren't brought together until the fourth season and were dissolved after the fifth. Peel's arrival also coincided with the series moving to film production (allowing location shooting and higher budgets). Opinion varies widely among fans, but the arrival of Tara King after Peel's departure is often seen as the shaving of the beard.
- Hilarious in Hindsight:
- Doesn't Steed look rather like David Cameron in the page picture?
- In the episode Two's a Crowd, a man who looks like Steed has it suggested to him that he wear a stick of celery in his lapel instead of a carnation.
- In the episode From Venus, with Love, Jon Pertwee plays a brigadier who's later killed by a laser beam fired by (supposed) Venusians.
- In the episode The Gilded Cage, Cathy Gale helps Steed organize a theft of gold bullion. When reviewing her plan, Cathy mentions how much bullion the United States has, and how it's kept in Fort Knox.
- Michael Gough plays a Mad Scientist who keeps super gadgets in his basement. His later role as Batman's butler Alfred Pennyworth needs no elaboration here.
- More Popular Replacement: Emma Peel was the third of four people to costar with John Steed, but the chemistry between actors Patrick Macnee and Diana Rigg made her by far the most popular choice.
- Narm Charm: It was the 1960s after all.
- Replacement Scrappy:
- Tara King. Otherwise averted with Emma Peel, who is more fondly remembered than her predecessor Cathy Gale.
- Neither Dr. Martin King (who was intended to be a replacement for Dr. Keel when Ian Hendry left the series) and Venus Smith (an innocent jazz singer who was supposed to be Steed's unwilling partner) were well thought of, and only lasted three and six episodes respectively, when Cathy Gale settled in as Steed's permanent partner.
- Retroactive Recognition: Young audiences will recognise Emma Peel as Olenna Tyrell in Game of Thrones.
- The series' guest actors sometimes provoke this as well. The most extreme example is probably "The Superlative Seven," which guest-stars a youthful, pre-fame Donald Sutherland, Charlotte Rampling, and BRIAN BLESSED all in a single episode!
- The fifth season premier, "From Venus With Love," had Jon Pertwee playing, amusingly, a brigadier general. (Note that this meant he was in the first color episodes of both this show and Doctor Who.)
- The New Avengers episode "Obsession" has Martin Shaw and Lewis Collins as a pair of terrorists. They worked so well together that they were given their own action series - The Professionals.
- Seasonal Rot: The series experienced this in its sixth and final season when Diana Rigg chose to leave the show, forcing Emma Peel having to be replaced with Tara King. The season was a huge Troubled Production and failed in America with ratings. An attempt at reviving the show (without Rigg again) failed too.
- Tough Act to Follow:
- Values Dissonance: "Castle of De'ath" features some rather stereotypical portrayal of Scottish people - namely that they use bagpipes to cover up their evil deeds and all walk around wearing tartan and kilts the whole time. Not to mention, to pass as a Scot Steed says his name is 'Jock McSteed'note .
- Values Resonance: Both Cathy Gale and Emma Peel were treated as equals to Steed - presumably because Cathy's early episodes were originally written for Dr King and Gender Flipped when he left. In later episodes, both Steed and his female partner would alternately save each other.
- "Weird Al" Effect: The Hellfire Club from the X-Men comics was a parody of the organization of the same name Steed and Peel battled in A Touch of Brimstone - while the Hellfire Club was a real thing in the 18th centurynote , the arc introducing the X-Men villains parodied the episode they're fought in this series. Due to a combination of the organization only appearing once in The Avengers, the X-Men villains being a key part of that team's mythos (not to mention being introduced during one of the most beloved arcs of that series), and syndication in the US omitting A Touch of Brimstone, most younger fans won't get the reference. Then again, this isn't the only time The Avengers has gotten overshadowed by a Marvel Comics property as a result of sharing a name.
YMMV / The Avengers (1960s)