Johnny Blair becomes a regular in the Captain Midnight strip beginning next issue.
Captain Midnight #10, according to the blurb at the end of the story, went on sale June 18th.
The last 1/3 of page 13 is an illustrated promotion for the Captain Midnight radio show, which features an upper body shot of Midnight and the listing of the radio stations the show is heard on.
The final 1/3 of page 10 is an illustrated promotional advertisement for Captain Marvel's E-Z Code Finder, featuiring an upper body shot of Captain Marvel, plus a full-sized representation of the code finder, which pictures head views of Bulletman, Captain Midnight, Captain Marvel Jr., Spy Smasher, and a 3/4 length view of Captain Marvel. Captain Marvel gives a code message as well.