OK, we know you know we know you know about Heavyweight, but it would be remiss of us to go on without mentioning it. From big-hitting network Gimlet Media and deadpan Canadian Jonathan Goldstein - long-time host of CBC's WireTap - comes a show about trying to heal the injuries of the past by addressing them in the present. Goldstein makes valiant efforts at this pursuit, both for himself and on behalf of others. In this episode, we meet his friend Gregor, who once lent an interesting CD box-set to a not-yet-famous Moby; the music inspired Moby's bestselling album, but Gregor received neither acknowledgement nor his discs back, and he's been nursing resentment about it for a decade. The two set out on a quest to recover the CDs and put Gregor's obsession to bed once and for all. That sounds rather sweet and silly, but there's an existential darkness in Heavyweight that elevates it beyond novelty. Because actually, it isn't possible to go back. You can patch up the present - and his subjects often achieve a kind of closure - but in truth, the past is immutable, and that makes Goldstein a man on a doomed mission. This is the elemental pathos that animates each episode: we know it's impossible to change the past, but we want to see him try. Essential listening, just about every week.