Seth Bybee continues our series of biological discussions by explaining the particularities of scientific theory, and the semi-certainties that that concept suggests. After that he and Dean move onto something that might have frightened some of you, and maybe without reason. It's okay. We all evolve!

BYU biologist Roger Koide discusses the fundamental interdependency of all species, great and small. He shows how an understanding of this quite wonderful reality can move us past the antagonism we sometimes feel toward other organisms, or to the positive voices that properly advocate for them.

Stan Benfell, a professor in BYU's department of comparative arts and letters, visits Dean to educate him about some very big words that we've all heard of, and might not know enough about. Classical? Medievalism? Romance? Renaissance? These sagas all unfold here.

College of Humanities professors Daryl Lee and Chip Oscarson visit the show on the 50th anniversary of BYU's celebrated International Cinema program. They affirm that though subtitles may seem hard at first, being open to the world's films may just help us to solve some of the world's problems.

Acclaimed essayist Patrick Madden rejoins the program to talk Dean through some of the rudiments, challenges and satisfactions of simultaneously living and writing your life.

Between the two of them, Gordon and Rella Christensen have more dentistry-related university degrees than you can even brandish a drill at. They bring all of that knowledge and experience, together with inspiring amounts of conviction and devotion, to show how if you take care of your teeth, your teeth will take care of you.

Dean warily welcomes three actual and authentic Millennials to the program. They tactfully try to tell him about how obsolescent he obviously is. He counters with unrelated and unconvincing tales about his cool youth. Altogether, a pretty depressing prospect!

Looks like Dean wanted Naomi Watkins, co-founder of Aspiring Mormon Women, to come on the show in order to personify the convergence of technology and feminism. Watch him scramble as Naomi quickly outflanks him, demonstrating again how much more people are than any mere preconception or pigeonhole.

BYU Communications scholar and professor Scott Church visits the program to talk about what's really important to him, which is the somewhat challenge and unspeakable privilege of being a (co) parent of all and only girls.

Brad Kramer, an instructor of anthropology at Utah Valley University, joins Dean to talk about his Writ and Vision gallery and bookstore, a general meeting place for smart and aspiring and restless people.