The Physics of Billiards, the documentary featuring Billiards Digest columnist Mike Shamos and WPBA star Jeanette Lee, will be on the air starting this week. The show, produced for National Geographic TV (www.ngs.org), will air on the following dates on the National Geographic channel at 9 pm EST: Tuesday July 16, Wednesday July 17, and Sunday July 21. The previously announced August 9th air date has been changed. Please note that the National Geographic TV episode listing is entitled “Ancient Poison, Modern Cure,” which is the cover story. The Physics of Billiards segment is in the second half of the show.