This week on the Extras, Mike, Jack and Sam answer your questions on Genesis 20-21 We're answering: - Is it ok that Sarah is actually Abraham's sister? - Why isn't Ishmael ever named in chapter 21? - 1 Chronicles 1 talks about lots of other descendants of Abraham - who are Abraham's descendants? - What ends up happening to the Ishmaelites? Are they the Arab people? And more!