In this episode, Robbie Robertson, the Daily Bugle's editor, make his first appearance in this series.
This is the first part of the five-part "Doom-saga" episodes spread through the series and written entirely by Larry Parr.
The secretary-general of the U.N. in this episode appears to be different from the one that appeared in "Dr. Doom, Master Of The World".
It is never revealed exactly what Dr. Doom wanted the Black Diamond for, but nevertheless, he did successfully steal it.