Perhaps the Internet’s leading expert on TV crossovers and the founder of Poobala.com, Thom Holbrook, joins us for a great episode this week. We discuss what makes a crossover great, run down some of our favorites, and then propose some crossovers we wish would happen. Our conversation is a roll call of great TV from Bob Newhart to The Bionic Woman to The Drew Carey Show to Mork and Mindy. OK, maybe great isn’t the best description. In this week’s Nerd To-Dos, we get our first genealogy related to-do, a re-commitment to comic book reading, and more Avengers items (it might take us awhile to get over that one, folks).