Sarah Koenig is a vault when it comes to season two of her podcast Serial, which airs this fall.

It reinvented podcasts, became a weekly addiction for millions and turned every listener into a DIY detective. Yes, we're talking about Serial, and after today's final instalment, we asked some superfans to share their thoughts.

Whodunnit podcast turns out to be high-quality entertainment, writes Karl Puschmann.

Need something to listen to while you're gardening, vacuuming or struggling to sleep? Paul Casserly has some suggestions ...