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《代号221》以中国第一个核武器研制基地（221厂）为视角，用影像记录中国原子弹、氢弹的研发历史，回望中国核工业在源起、研发和试验等方面取得的重大成就，展现中国核武器科研工作者的精神风貌。。The Walker family future looks hopeful - until Cordell vanishes. As mysterious captors try to physically and mentally break him, Captain James, Cassie and other Rangers strive to rescue Cordell, but Stella has her own ideas about helping.。