(written from a Production point of view)
Christine Harnos (born 16 November 1968; age 49) is the actress who portrayed Tessa Omond in the Star Trek: Voyager episode "Timeless". Her boots from this appearance were sold off on the It's A Wrap! sale and auction on eBay. 
In other works, she was most notable for her long-term, recurring portrayal of the ex-wife of Dr. Mark Greene on the television series ER. Harnos has also had a variety of roles in feature films and telefilms, including important credits in Bloodhounds, Pink as the Day She Was Born, Hollywood Confidential and Remembering Sex.