Happy Friday, everybody! Time for another Ask Alan, hitting up four topics: What makes a good flashback episode, whether Dennis Franz will ever un-retire, what TV musical scores I listen to when I'm not watching TV, and a return to the subject of TV loose ends that can frustrate.

As always, you can watch the video at the top or bottom of this post, and you can send questions to askalan@hitfix.com, or by tweeting @sepinwall with the hashtag #AskAlanDay.

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 sepinwall@hitfix.com