I'm ashamed as well. Just went back and watched the episode again and sure enough, he is indeed mentioned!

I never realized that. I know I am a little late, but I assumed Satchel was Milligan's son the first time I saw him, because season two was my first and favorite season I watched, I just assumed.

Yeah, kind of assumed it but also felt it was too clear, and that it could have been some misdirection. But no, that was it really :P