Watch as a killer T cell (yellow) goes head-to-head with a cancer cell (magenta) in an intense microscopic battle. With each targeted strike, the cancer cell flashes—signaling internal damage—but it takes several powerful hits before the cell begins to break down. This real-time footage offers scientists a closer look at the immune system in action, revealing why some cancer cells manage to withstand attacks. These insights are crucial for developing new ways to boost immune responses and design