Watching Adam West's BATMAN is like watching not 3, but 4 DIFFERENT TV series in one. Let me explain...
The 1st season really captured a special, unusual, and apparently hard-to-maintain balance between "adventure" and "weird humor". I was just watching a video interview with director Robert Butler, who said the instant he read the script for the pilot, he "got" it. Some writers "got" it. Some actors did-- ESPECIALLY Adam West. But too many didn't. It turns out, Butler did the first 3 weeks produced-- the 1st Riddler story, the 1st Penguin story, and the 1st Mr. Freeze. Even now, those stories are INCREDIBLE to watch. As are several others, including Zelda The Great, the 2nd, 3rd AND 4th Riddler stories, and, perhaps best of all-- the 1st Catwoman story. WHOA. That's played even more "straight" than the George Sanders Mr. Freeze was.
Even at 7 years old... when my family took me to the drive-in to see the "BATMAN" feature film... even then... I sensed, SOMETHING was wrong. That delicate balance was gone. The sense of real DANGER was gone. Everything was in broad daylight. The plot rambled. The main highlight of the film was Lee Meriweather... and, crazy enough, I've concluded over the years she was not playing the same character Julie Newmar did. Heh.
Season 2 started, and just as much as the change between seasons 1 & 2 of LOST IN SPACE, it was like watching an entirely different show. Instead of an adventure show with weird humor... it became a SITCOM with costumes. Turns out, story editor Lorenzo Semple Jr., who had forged so much of season 1, stepped down, and they promoted the WORST writer on the show-- Charles Hoffman-- to be the new story editor. It's still watchable-- IF you're in the right frame of mind. But it took until the 2nd HALF of season 2 before they finally got around to doing some stories I really liked. Specifically, "The Zodiac Crimes" 3-parter, "That Darn Catwoman" (which some have argued SHOULD have been the season FINALE), and "Pop Goes the Joker" (a bit of which turned up in the 1989 feature film). The rest... "ehh!"
And then you have season 3. OH. MY. GOD. Talk about FALLING RIGHT OFF A CLIFF. I just re-watched the entire 3rd season from start to finish for the first time in decades. I tolerated most of it. That's the best I can say. There are really only 5 episodes in that entire season I like. 5 !!! One is so straight, it feels like season 1 -- The Siren with Joan Collins. The others are all HILARIOUS comedies written by Stanley Ralph Ross, which work simply because they're so FUNNY-AS-HELL. That's the 2 episodes with King Tut, and the 2-parter with Shame, his gal Calamity Jan, and her mother, Frontier Fanny. Ross later went on to develop the Lynda Carter WONDER WOMAN show. Boy, he was good.
It's a shame they couldn't have maintained the quality from when it started. Yvonne Craig deserved better.