As you can see, both Connor Temple and Abby Maitland are back, but we also have some new characters. The team's new leader, Matt (Ciaran McMenamin) is an ex-soldier and zoologist. Jess (Ruth Kearney) is in charge of running operations at the ARC control centre. And I found it interesting to hear that Alexander Siddig of Star Trek: Deep Space Nine fame is appearing as Phillip Burton, a scientist and partial owner of the ARC. In other interesting news, Lucy Brown is returning for Series Four, but it is unknown whether she will be playing Jenny Lewis or Claudia Brown.
Can't say that it matters to me, as I'm just looking forward to the return of the series! :)