He has been sane the entire time. He is accompanied by a new partner (which is suspect) and has migraines due to his PTSD from his expirience in world war two. He is given psych meds from the institution which is a US expirimental psych ward carried over from Nazi scientists. At the end he accepts his lobotomy because he would rather live than to die a sane man. This lobotomy also is his answer to forgetting his past which is his plague (the war and his lover whom he is no longer is with). He knows that he will never escape the island and would be murdered If he were to try. The government experiment would be compramized and he realizes his only option to true serenity.

He has been sane the entire time. He is accompanied by a new partner (which is suspect) and has migraines due to his PTSD from his experience in world war two. He is given psych meds from the institution which is a US experimental psych ward carried over from Nazi scientists. At the end he accepts his lobotomy because he would rather live than to die a sane man. This lobotomy also is his answer to forgetting his past which is his plague (the war and his lover whom he is no longer is with). He knows that he will never escape the island and would be murdered If he were to try. The government experiment would be compromised and he realizes his only option to true serenity.