Whenever Dan or Jim received their instructions, They always turned on the tape recorder first, then opened the folder with the photographs.
Voice on Tape:
As always, should you or any of your IM force be caught or killed, the Secretary will disavow any knowledge of your actions. Good luck, Jim. This tape will self-destruct in five seconds.
In almost every episode someone has to pick a lock. They insert the pick, wiggle it a few times and open the door. To actually open a lock you must also rotate the cylinder just as you do with a key. For this you would use a second "L" or "Z" shaped pick to exert pressure while you moved the pins with the first pick. This is never done.
Episode titles were not shown on-screen. Although this became commonplace with dramatic series in the late 1980s, it was unusual in the 1960s for a one-hour action series to not have episode titles.