This Is A Disaster is disaster history told by people who sound more curious than solemn. Peter and Lee frame each episode around a calamity, then let the conversation breathe, swerve, and snap back to the facts. The show covers ship explosions, train crashes, hijackings, nuclear accidents, failed festivals, and even a Def Leppard-shaped turn through music history. It is not tidy. That is part of its texture. The storytelling often moves from a historical detail into a joke, a callback, or a small domestic aside before returning to the terrible chain of decisions at hand. Episodes about the SS Viking and the Almonte Train Disaster linger on weather, visibility, procedure, explosives, speed, and missed safeguards. The Yodogo Hijacking episode widens into political factionalism and student radicalism. The SL-1 episode brings reactor mechanics into a room full of innuendo and music chatter. Woodstock 50 and Def Leppard show the same appetite for cultural wreckage, where bad planning, nostalgia, fame, and myth-making can become their own kind of disaster. Peter and Lee are named as co-hosts in the excerpts, with Craig and Nuclear Norm appearing as special guests. The guest episodes add a second current: sidebars that can compete with the main story without fully derailing it. The show also treats music as more than a closing gimmick. Songs, radio memories, MuchMusic, MTV, Bandcamp, and era-specific listening habits keep appearing around the historical material. That music angle gives the bleakness a strange companion piece. The humor is blunt but not careless in its function. It creates enough oxygen for stories involving death, injury, mental health, political violence, and institutional failure. At times the show feels like friends in a studio daring each other to keep going through the darkest part of the notes. At other times it settles into clean explanatory mode, walking through causes and consequences with surprising patience. The pacing favors digressions, but the subject always comes back into view. This Is A Disaster works best for history listeners who like their research conversational, morbid, and musically literate.