What actors and actresses appeared in Breakthrough at Reykjavik - 1987?

There appears to be no film or television production with the title "Breakthrough at Reykjavik - 1987".

Are you thinking of another film or documentary?

Perhaps you are thinking of the Reykjavik Summit, which took place in 1986 between President Ronald Reagan and Soviet General Secretary Mikhail Gorbachev.

If you can provide any more information, I can try to assist you.