Time for the second Firewall & Iceberg Podcast of the week, as Dan and I look ahead to the first new shows of the 2012-13 network TV season, check back in on AMC's "Hell on Wheels" as it begins its second season, and talk a little bit about the most-watched — if not always best-liked — TV show of the summer.

The line-up: 

"Go On" (00:01:30 - 00:15:30)
"Hell on Wheels" (00:15:30 - 00:25:40)
"Animal Practice" (00:25:45 - 00:38:25)
The Olympics (00:38:25 - 00:55:00)
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Alan Sepinwall has been reviewing television since the mid-'90s, first for Tony Soprano's hometown paper, The Star-Ledger, and now for HitFix. His new book, "TV (The Book)" about the 100 greatest shows of all time, is available now. He can be reached at