In July 2024, Daylon and Arun attended the International Society for Stem Cell Research’s (ISSCR) annual meeting in Hamburg, Germany, and recorded daily episodes discussing highlights of the previous 24 hours. Here is the final of four episodes from the meeting. Sessions focused on stem cell research in space, regulatory and ethical considerations for human embryo models, and developing therapies for SCID, epilepsy, and spinal cord injury. Daylon and Arun also discussed work on salivary gland organoids and patient advocacy in Parkinson’s disease research.