Heather; she is no longer the cold vixen seen during her first appearance. "Leave Out All the Rest" 2008, in CSIs ninth season, two years after Lady Heather's last appearance, Grissom, depressed and grieving over the loss of his relationship with Sara, pays an unexpected visit to Lady Heather, who has become a registered psychologist and practicing therapist. The ostensible excuse for the visit is in connection with a murder that appears to be related to an S&M session gone wrong, but Heather suspects there is another reason, both for the murders and for Grissom's sudden reappearance in her life. It would appear that she is correct on both counts; the episode ending is ambiguous, both in terms of the solution of the case, and in regard to the ever-changing and undefined nature of the relationship between Heather and Grissom. "Unleashed" Melinda Clarke reprises her role as Lady Heather in the Season 11 episode "Unleashed". In this episode, she is now a sex therapist who uses her real name which is Dr. Kessler. She helps Sara and Dr. Langston solve the case of a woman mauled to death by a mountain lion. The victim, a co-founder of a women's shelter, was one of Lady Heather's patients. "Immortality" Clarke reprises her role as Lady Heather in the finale movie alongside returning actors William Petersen and Marg Helgenberger, spurred by her initials "LHK" appearing on the handle of a key recovered from the first bomb site. Grissom reveals that his safeword with Lady Heather was "stop". It's revealed that her granddaughter had been killed in a hit-and-run before the episode. Episode links Season 2 episode "Slaves of Las Vegas" (11-15-2001) Season 3 episode "Lady Heather's Box" (2-13-2003) Season 6 episode "Pirates of the Third Reich" (2-9-2006) Season 7 episode "The Good, the Bad, and the Dominatrix" (5-10-2007) Season 9 episode "Leave Out All the Rest" (11-6-2008) Season 11 episode "Unleashed" (4-7-2011) Series finale "Immortality" (9-27-2015) References External links Lady Heather at the CSI Wiki CSI: Crime Scene Investigation characters Fictional dominatrices Television characters introduced in 2001