With the DC Universe ever expanding in the TV screens, we see The CW's "Arrow" series bringing in characters from the comic books, most particularly Talia al Ghul. Reports have already confirmed that actress Lexi Doig ("Continuum," "Stargate SG-1" and "V") will be taking the role of the female assassin.
According to IGN, Lexi Doig's Talia al Ghul is the daughter of Ra's al Ghul (played by Matt Nable) and half-sister of Nyssa (with Katrina Law currently taking the role). Doig's debut as the deadly assassin will appear in "Arrow" Season 5 and will be appearing as a recurring character in future episodes, joining in the fray with Oliver Queen/Green Arrow (Stephen Amell).
The name of Talia goes back to The CW's "Legends of Tomorrow," another of DC Comics based show, when she was portrayed as a little girl during the 1960s in the episode "Left Behind." Like her father, it could be presumable that Talia could have maintained her age with the use of the Lazarus Pit. Other media appearances of the character could point to Christopher Nolan's version in "The Dark Knight Rises," whom actress Marion Cotillard has taken the role of.
In the comics, Talia al Ghul had some relevance to Batman's story (actually a LOT of connections). Like many of Bruce Wayne's lovers, she was a romantic interest to the caped crusader and even had a child with him, despite being one of the enemies. Their child eventually trained in acrobatics and combat with the Ra's al Ghul's League of Assassins and became Damian Wayne, the current Robin in the comic book series.
While being a character from the "Batman" series, the presence of Talia al Ghul (along Ra's and her half-sister Nyssa) might open the possibilities of bringing in Bruce Wayne in The CW's "Arrow." Here's what executive producer Marc Guggenheim previously mentioned in The Hollywood Reporter:
"At the end of the day, it'd be so awesome to have Batman on the show. That'd be really cool. I don't think that will be happening anytime soon, but you never know... one day. One thing we're always saying... we ended up with a lot more DC Comics characters becoming part of the show than we had ever planned. It wasn't initially part of the pitch or the conception of the show. ... I've learned not to expect anything or make any predictions because the reality has far exceeded any of our initial predictions or initial conceptions."
"Arrow" airs every Wednesday at 8PM on The CW.