Cells at Work!

S01E09 Thymocytes

During a training exercise, Killer T Cell abruptly hurls one of his underlings straight into Helper T Cell's office, sparking an immediate clash between the two complete opposites. Dendritic Cell reveals that despite their radically different functions now, they were once classmates at Thymus School—and their personalities back then were nothing like they are today. So what exactly formed between these two during those brutal days at Thymus School, where a mere two to three percent of cells lived through the ordeal?