18:25 to 18:45 amazingly, almost the same melody here in this time frame, is played in "Executive Action" with Burt Lancaster and Will Greer portrayal of JFK assasination. Only in certain parts of the movie, the same can be heard. The frame here from Lost in Space, is not frequent tune, but is used in other episodes depending on the mood and situation. (20:39 to 20:50) again comes up-sounds like the excerpt from Executive Action, when the assasin teams are practicing before they carry out in Dallas, Texas a sad day of course. It is heard when they recon Dealy Plaza at about 45 minutes before the end of the movie, and again 15 minutes before the end when its actually carried out.