The rear view mirror of Sgt. Joe Broadhurst's car is present when seen from perspective of a back seat passenger but disappears when the perspective cuts to a front view.
Hired killer Carl Stokes (Ray Danton), who is stalking McCloud through Philharmonic Hall (now Avery Fisher Hall in New York) goes from one level of floor to another via an escalator. The two floors seem to share a common ceiling and are brightly lit. Stokes shoots it out with McCloud and takes a fatal slug in the chest. The next shot, seen from the top of the ascending escalator (Stokes staggers to it and collapses on the steps, riding it to the top) shows the escalator as being under a canopy of some kind, lit only by the floor light at the bottom - it's pitch-dark all around it.
The bank robbery and fatal bombing in Taos took place three years earlier, in 1969. But Broadhurst, reporting to Clifford after Carl Stokes is found dead, says Stokes could not have been the unidentified second bandit because "he was stationed in Germany from 1966 to 1969." (The novelization of this story corrects the error to say Stokes' term lasted from 1968 to 1971.)