"Scourge of the Skeletal Riders"
First appearance of the Four Horsemen of the Apocalypse.
*The Teen Titans travel to Ranistan, a foreign land torn by civil war, to rescue an old friend, newsreel cameraman Grady Dawes, who is missing and presumed dead while covering the conflict for the media. Again and again, they find their efforts thwarted by mysterious figures resembling the Biblical Four Horsemen of the Apocalypse. Finally, Death (in the form of the final Horseman) claims Grady Dawes, while the Titans are occupied saving a young Ranistanian mother and child from his fatal scythe. *Source: Official Teen Titans Index #2 - Published by ICG
Also reprints "Superboy Meets the Young Green Arrow" from Adventure Comics (1938) #258.