Written by William Raynor and Myles Wilder, "The Blood Line" opens as Luke Grayson (played by former B-western star Allan Lane) goes on a violent drunken rampage, forcing Ben Cartwright to shoot and kill the man. Grayson's son Todd (David Macklin), newly arrived from the East, swears vengeance against Ben and the entire Cartwright clan. The powerful supporting cast includes Jan Sterling as Dianna Jordan, Lee Van Cleef as Appling, Norman Leavitt as Bert, and science-fiction film habitue Thomas Browne Henry as Jenkins. "The Blood Line" was originally seen on December 31, 1960. ~ Hal Erickson, All Movie Guide. Bonanza: The Blood Line (TV episode). Answers.com. Movies, All Media Guide, 2006. http://www.answers.com/topic/bonanza-the-blood-line-tv-episode, accessed July 13, 2008.