Premieres Wednesday, Oct. 22, 2025 at 8 p.m. on KPBS TV / Stream with KPBS+ / Encores Thursday, Oct. 23 at 7 p.m. on KPBs 2 and Sunday, Oct. 26 at 2 p.m. on KPBS TV. The walrus is one of the Arctic’s most enigmatic and social animals, relying on sea ice to live. Follow a paleontologist who embarks on an Arctic adventure to see how these mammals are coping in a warming world.