Cliff Carmichael (Thinker)
Cliff Carmichael (Thinker) appears in 29 issues in grailworth's catalog, and was first published in 1978. First appearance: Firestorm #1 (1978), cover dated 1978.
First appearance
Every appearance we value
Firestorm (1990) 1 issue
Firestorm (2004) 3 issues
Flash (1959) 2 issues
Character appearances from the Grand Comics Database, CC BY-SA 4.0.