Richard Lineback appeared in the Star Trek: The Next Generation episode "Symbiosis," playing the role of T'Kar, a key figure in the episode’s story about addiction and diplomacy. His performance added a grounded intensity to the ethical dilemma faced by Captain Jean-Luc Picard and the crew of the Enterprise-D. Although Lineback is primarily known as a character actor in film and television, including notable roles in movies like The Texas Chainsaw Massacre 2, Star Trek fans appreciate his contribution to the franchise’s exploration of complex social issues. His work in "Symbiosis" remains a memorable part of The Next Generation’s seventh season narrative.