D2-067 Ming IV

Writer: Harry Harrison

Art: Dan Barry 

Summary: Safely back on Earth after his 'steel cargo' adventure, Flash is alerted to Dale being in danger and walks straight into a trap sprung by the perpetrator, who claims to be a future descendant of Ming the Merciless.

Facing Ming IVs immediate revenge for the death of his great-grandfather, Flash is unceremoniously thrown into a dimensional doorway to the planet Ognom, where time moves in super-speed towards fast death for Earthmen...

(Source of summary: www.ipcomics.net) 

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It's from Emile's e-collection. All credits go to her & "Allen Lane" who scanned and first shared at net.

P.S. I don't have D2-62 to 66.