#15 — Questions Along the Path

#16 — The Dark Side

#17 — What I Really Think About Profiling

#18 — The Multiverse & You (& You & You & You...)

#19 — The Riddle Of The Gun (Revisited)

#20 — Still Sleepwalking Toward Armageddon

#21 — On the Maintenance of Civilization

#22 — Surviving the Cosmos

#23 — Islam and the Future of Tolerance (Audiobook Excerpts)

#24 — Ask Me Anything 2