This was the second episode to be produced, but aired eleventh in the season.
Caroline Langrishe was originally cast as Mandy Mitchell, but she was not available for the revisions, so Judy Matheson was brought in as a replacement.
"Dr. Ernest Harbinger" is clearly meant to be Richard Nixon's former Sec. of State, Dr. Henry Kissinger.
Ramos' assistant Vila was a late addition to the script, as was the opening scene of Bodie and Doyle watching the film of Cowley.