Adventure Comics #320
- Series: Adventure Comics
- Issue: 320
- Publisher: DC
- Published Date: May 1964
- Cover: Curt Swan, George Klein, Ira Schnapp
- Writers: Jerry Siegel, Otto Binder, Jerry Coleman, Henry Boltinoff
- Pencil: Curt Swan, John Forte, George Papp, Henry Boltinoff
- Ink: George Klein, Sheldon Moldoff, George Papp, Al Plastino, John Giunta, John Fischetti, Henry Boltinoff
- Appearances: Mon-El, Dev-Em, Superboy
Story 2: "Revenge of the Knave from Krypton! Part I"
Dev-Em arrives at Legion headquarters as a member of the Inter-Stellar Counter-Intelligence Corps on a mission to nab the elusive leader of the Cosmic Spy Legion, Morlock the Merciless, but loses the assignment to Superboy.
Story 7: "Part II: The Treachery of Molock the Merciless!"
Superboy successfully completes Dev-Em's mission, with Proty II's help.
Tricksy comes up with a stunt to get more applause.
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