Previously on Lost, we journeyed into an out-of-the-way cave and received some intriguing intel about Jacob and our castaways. Of course, considering that the Man In Black/Locke/Smokey served as our tour guide, we are left to question the veracity of this information. Perhaps we will find further illumination in a “Lighthouse,” which is the name of this week’s episode. But don’t go wandering off into the jungle half-cocked—prepare yourself properly by watching the latest installment of Totally Lost, in which your semi-reliable hosts—Jeff Jensen (Doc!) and Dan Snierson (hey, that’s me!)—break down the action from “The Substitute,” and provide teasers for “Lighthouse.” You will also be forced to choose sides—between good and evil, yes, but also between… Rush and Huey Lewis. Trust us, it’ll make more sense after you press play. And when you ‘re finished, take advantage of the space below to express any residual feelings about “The Substitute.” What was the best moment of the episode? How many of Smokey’s cave facts do you believe? And do you think Ben and Locke will mentor rival students who wind up strangling each other backstage at the high school talent show? Let us know. And be sure to follow us on Twitter @ewdocjensen and @dansnierson (but run the other way from @pigevil).