First reference to "Young Marvelman," who is given top billing on this cover, and is introduced in this issue's editorial remarks, prior to next issue's changeover to the official "Young Marvelman" title, in response to the US legal battle over Captain Marvel between Fawcett and DC.
Note: #19 makes mention of Marvelman Jr., which is changed to Young Marvelman, but this is the first reference to Young Marvelman.