But the USA born Brit said they "haven't figured out a way yet to kill me and get away with it".
He has also downplayed conclusions by USA intelligence services that Moscow interfered in the US presidential election in 2016 and warnings that it will likely continue to do so.
After a pro-West government was installed in Kyiv, Moscow responded by seizing control of Ukraine's Crimean Peninsula in March 2014 and fomenting separatism across much of the country - one of the causes of a war that has killed more than 10,300 people in eastern Ukraine since April 2014 and displaced more than 1.6 million Ukrainians.
The 90-minute documentary, airing less that two weeks before elections in which he's expected to easily win a fourth term, portrayed Putin as a decisive actor on the world stage.
Russia has never used nuclear arms, the Russian leader said, noting that the US did against Japan at the end of World War II.
"Those who serve us with poison will eventually swallow it and poison themselves", he said.
Mr Putin made his comments at a time when British police are investigating the apparent poisoning of a Russian double agent and his daughter in Salisbury, England, although he was not addressing that issue when he made the comments.
Mr Putin, who presented a sweeping array of new Russian nuclear weapons last week, voiced hope that nuclear weapons will never be used but warned that Russia will retaliate in kind if it comes under a nuclear attack.
Speaking to parliament, Johnson said Britain might step up sanctions against Russian Federation if it finds that Moscow was involved in the incident. Among the new cutting-edge weapons are the Sarmat intercontinental ballistic missile, the Kinzhal hypersonic weapons system, a nuclear-armed cruise missile, as well as a dual-capable unmanned underwater vehicle, which is meant for conventional and nuclear missions.
The remarks came under criticism from North Atlantic Treaty Organisation as well as the United States, Germany, France, and other Western countries.
"The American partners appealed to us and asked us to do everything, and I say nearly literal request, to make Yanukovych not to employ the army to allow the opposition to free the squares, administrative buildings and proceeded to the fulfillment of the reached agreements on the normalization of the situation", Russian president said.
He said: 'This is called a retaliatory, counter strike, when we receive a legal right to respond.
"Yes, this will be a global catastrophe for the world, but as a Russian citizen, as the Russian president, I want to ask a question: who needs the world without Russia?"
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