Based on copyright dates, the Grim Reaper's appearance here follows his appearance in The Fighting Yank #7. He appears next in Wonder Comics #2 - Origin of the Grim Reaper.
1st Appearance and origin of Mekano.
1st appearance of Spectro.
The Tim Dawson story arc is printed out of order, with Part 1 appearing in Wonder Comics #2 and Part 2 in Wonder Comics #4. This issue has Part 3.
1. Underground Mission To Greece (15 pages) - Featuring The Grim Reaper by Al Camy
2. The Origin of Mekano (15 pages) - Featuring Mekano by Bob Oksner
3. Prisoner of War (1 page) - by John M. Easterly
4. The Peril of the Professor (8 pages) - Featuring Spectro by Al Camy
5. Peril Canyon (1 page) - by Jackson Cole
6. "Mt. Abengi" (8 pages) - Featuring Tim Dawson by Ken Battefield
