|Karin Ruth Bernstein|
|Rank:||Crewman; rose to Lieutenant during alternate timeline|
|Spouse(s):||Ethan Shapiro, Joshua Rosen|
|Children:||Alia Shapiro, Rebecca Shapiro, Hanna Rosen|
Karin was raised in a moderately observant Jewish home and knew the Hebrew prayers (The Light).
Karin joined Starfleet fresh out of the Academy in 2154, and was brought in for Tactical work. Her placement on the Enterprise was a direct result of a shift in personnel after the Xindi attack on Earth. Her direct superior officer was Malcolm Reed.
In 2156, she began dating Andrew Miller (In Between Days: The Light). That relationship ended up some time before 2159, when she began dating Ethan Shapiro (In Between Days: Together). In November of 2165, Berstein married Shapiro (In Between Days: Fortune).
Her younger daughter, Rebecca, was born in 2175, and eventually married Declan Reed.
First temporal displacement due to Kovaalan particle wakeEdit
In 2037, after the Enterprise was sent back in time, there was fierce competition among the male Jewish crew members for Karin's interest. She selected Josh Rosen. The announcement of their engagement, in October of 2037, and then their wedding in November of that same year, sent Ethan Shapiro into a downward spiral of depression (In Between Days: Reflections Down a Corridor) and he attempted to take his own life on March 27, 2038 (In Between Days: Entanglements).
In October of 2038, due to her extreme competence, Karin was promoted to the rank of Ensign and was awarded the Distinguished Service Medal by Captain Jonathan Archer, in recognition of her work in cross-training in command. A month later, her pregnancy (Hanna Rosen) was announced to the crew.
Second temporal displacement due to Kovaalan particle wakeEdit
When the Enterprise was temporally displaced a second time, there was a database of information left by the earlier iteration. One of Karin's tasks was to assist in interpreting the Tactical data. She was given more responsibility after Malcolm Reed's early death.
At some point, she again had a daughter named Hanna. This one was the second wife of Lorian Tucker and was the second child born during that iteration.
In 2038, after there was a short mission to Earth and dogs were brought on board, Karin assisted the captain with training them to herd food animals called procul.
In 2082, after Captain Archer's wife, Esilia, and other Ikaarans on board had died, her marriage opened up slightly, and she was one of the women who platonically dated the captain (In Between Days: Everybody Knows This is Nowhere).
- "I don’t know how I’m going to deal with Ethan – Shapiro, not Novakovich. I feel so awful, in some ways, but he is just a friend. This is such a weird situation to begin with. I mean, we start off as buddies, the four of us, and then suddenly it’s Open Season on me. So I became Karin Bernstein, the prize at the bottom of the Yiddishe Crackerjack box."
- — (Reflections Down a Corridor)
- Images of actors are used to simulate the cast of the series. As a result Karin Bernstein is portrayed by Natalie Portman.