Last week's episode of Lost had its customary waste-of-time comic relief, but otherwise we found out a little bit more about those strange puffs of black smoke that killed the poor pilot at the beginning of the series, and we also had another inexplicable coincidence in a backstory - these coincidences may hold the key to what's really going on in Lost.

• blog post review: Kate, black smoke, Juliet
• essay: Keys to What's Really Going On
• my latest novel: The Plot to Save Socrates