(written from a Production point of view)
Julia Nickson or Julia Nickson-Soul (born 11 September 1958; age 61) is an actress who appeared as Lian T'Su in the Star Trek: The Next Generation first season episode "The Arsenal of Freedom" and Cassandra in the Star Trek: Deep Space Nine second season episode "Paradise". She is also known for her role as Catherine Sakai on Babylon 5. During the pre-production of TNG, she was considered for the role of Tasha Yar, but lost to Denise Crosby. 
She is probably best known for co-starring with Pierce Brosnan, Eric Idle and Peter Ustinov in the 1989 television version of Jules Verne's Around the World in Eighty Days, and for appearing with Sylvester Stallone in Rambo: First Blood Part II (with Charles Napier and Steven Berkoff).
She would have become a recurring character on seaQuest 2032 in 1996, but the show was canceled and she only made one appearance as Lieutenant Commander Heiko Kimura. She was formerly married to Star Trek: The Original Series guest star David Soul between 1987 and 1993. The couple has one daughter, China Soul.