|Season(s):||1, 2, 4|
|First Episode:||Truth Be Told|
|Last Episode:||In Dreams...|
|Portrayed by:||Angus Scrimm|
Calvin McCullough was a senior officer at SD-6.
After Julian Sark allied himself with SD-6, Sloane explained at a Mission Briefing that Sark had a thorough debriefing with McCullough who determined he could provide credible intel. (Passage, Part 1)