Ailing arch-spy Marcus Klingberg, 88, admitted Thursday to Channel 2 that his wife, Wanda, had also been in the business of espionage.
Klingberg was released from prison in 1998 after serving more than 15 years of an 18-year sentence for spying for the former Soviet Union.
Klingberg was arrested and brought to trial in 1983 while on his way to attend a scientific conference in Europe. He was jailed in 1983 for passing biological warfare secrets to the Eastern Bloc.
At the time, he was deputy director of the Ness Ziona scientific research center and was a renowned expert on biological warfare.
BATSHEVA TSUR contributed to this report.
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