Saw Leland Orser in "Saving Private Ryan", but it took awhile to figure out who he was (the actor, not the character he was playing). I kept telling myself that I knew him from something else. So I did the IMDb check, and this is what I know him from:
And from Wikipedia:
Lucien Dubenko is the current Chief of Surgery. He was first introduced shortly before Elizabeth Corday departed, as an arrogant but obviously talented surgeon, bragging about, and then showing his ability to run the bowel with a laparoscope. Dr. Corday bitterly protests his hiring to Kerry Weaver. Corday's anger causes her to conduct an illegal organ transplant between two HIV+ men, which leads to her being reprimanded and being forced to take a demotion. Corday eventually quits the hospital altogether, though Dubenko praises her actions in doing the transplant. Dubenko is portrayed as a very dedicated and talented surgeon, with a keen interest in medical science, lecturing the interns on physiology. Dubenko becomes friends with residents Abby Lockhart and Neela Rasgotra, and later seems to fall for both of them, most notably Neela after she becomes a surgical intern. He has a baby sister who lives in an assisted-care facility because she was in a car crash caused by her drunken teenage boyfriend that left her with brain damage. After he discovers he has prostate cancer, he asks Abby to have sex with him to make sure he is fully functioning after surgery, but reacts with equanimity when she declines the offer. During Luka and Abby's wedding, he asks Luka to take care of Abby. He was involved in a "friends with benefits" relationship with new ER Chief Dr. Skye Wexler, which later ended after he lashed out at her for excluding him from her life and accused her of being a slut. He later resigned in protest over the death of patient Sheryl Hawkins, when he had to leave the OR and leave Dr. Rasgotra (Junior Resident) to finish the operation, because he was the only attending available in the hospital, this ouburst enraged Dr. Anspaugh during the M&M. Efforts by Neela and Simon Brenner led to his return in Season 15, and he later justly criticized Neela for her dismissive attitude towards teaching surgical residents.
Skye Wexler was played by Kari Matchett, most recently (and still on) Covert Affairs.