a.k.a. Zygier: 1. Traded Israel's nuclear secrets with the Ausies. 2. Became an out-of-sanction Mossad serial killer. 3. Suffered from work-related paranoia that became so severe he became a threat to both Israel and himself. 4. Had a "Total Recall" event. 5. And most likely, a borderline schitzophrenic personality given 4 personalities, he chose suicide over madness.