The decision to switch to one episode a week for the final 1967-68 season (instead of two episodes, with the first ending in a cliffhanger) may have been what really killed Batman
. (Somewhere I have an "autographed" photo of West & Ward from the 1966 movie spinoff of the show; I must have been 8 or 9. Imagine a series so popular in its first half-season
as to justify a theatrical movie the same year!)
In recent years I've seen both Yvonne Craig and Steve Ihnat in It Takes a Thief
, in two different episodes (this was when Gene Coon was producing that series, so it wasn't long after their Star Trek
appearance). Malachi Throne was a co-star in the early year(s) of that series.