《我是哪一个》 A Number

一个儿子从小到大都以为自己是家里的独生子，偶然间发现自己不过是好几个克隆版本其中之一。面对儿子的质问，父亲支支吾吾地承认说亲生儿子早年夭折，于是决定让医生克隆一个一模一样的儿子，但医生违背医学伦理，偷偷克隆了好几个。父亲决定要起诉医院。
然而父亲的说法不尽不实：亲生儿子不但没有过世，而且也才得知父亲竟然抛弃了他而克隆出另外的儿子。父子对峙的过程牵出一系列谜团：父亲当年为何要克隆儿子？母亲哪去了？克隆版本的存在对亲生儿子的成长和自我认同产生了怎样的冲击？而克隆人的身份和尊严又如何定义?

The play begins with a father, Salter, and his son Bernard (B2) discussing the fact that the son has found out that he has been cloned. The father claims not to have known this and claims that a hospital must have stolen his cells at some point and made illegal copies of him. He talks about suing the hospital for money. The son then mentions that there were others and the father admits that the son is a clone. He says that the original son and his mother died in a car crash and that he wanted his son back so he had him cloned. Then the original son confronts Salter and has a discussion about the clones, Salter again denies knowledge about the others. It turns out Salter lied about the mother dying in a car crash; she killed herself by throwing herself under a train; and that the original son did not die, but was instead 'sent away' by Salter, unable or unwilling to care for him due to his grief. The first clone then finds out the original is still alive. Bernard (B1) meets with Bernard (B2) and murders him, and then proceeds to commit suicide. Salter then meets with Michael Black, another clone. Michael Black lives a very normal life, has a wife and three children, and is happy. Salter ends up miserable and seemingly alone even though he knows that there are 19 more clones.