Commissioner Gordon: Batman, you unscrambled that safe's combination in three seconds flat! How did you do it?
Batman: With my Three-Seconds-Flat-Bat-Combination-Unscrambler, Commissioner.
Robin: Persimmon pressurizer? Holy astringent plum-like fruit!
Robin: What happened to Batgirl?!
Batman: Who knows, Robin? Who ever knows?
Batman went into syndication in September 1969.
This was the 2nd appearance of Freddy "the Fence" Touche. He previously appeared in the second season episode called "Batman Displays His Knowledge" in which was Julie Newmar's last appearance of Catwoman.
A total of 352 "Holy" words were used by Robin from "Holy Agility" to "Holy Zorro".
The Dynamic Duo, Adam West and Burt Ward, would later reappear on CBS Saturday Morning to voice their animated counterparts in The New Adventures Of Batman, which aired on CBS from Feb 1977 to Sept 1978. Interestingly, The Dynamic Duo's first appearance as animated characters were in the opening titles of the live-action Batman TV series.
After the show was canceled by ABC, NBC showed a great interest in purchasing the show! Tragically, the whole set demolished in a effort to get valuable space on the studio lot, forcing NBC to decline because weren't willing to invest in the great cost to rebuild the set.
Special appearances by show producers William Dozier and Howie Horwitz add a little inside humor to this series finale. In his brief scene, Dozier plays a rich television producer and says the secret of his success is "never hiring method actors and never listening to network executives."
The short-lived ABC sitcom The Second Hundred Years occupied Batman's former 7:30 Thursday night slot the following week and stayed there for the remainder of the 1967-68 season, so you notice that Batman didn't go into reruns that summer!