Katharine Cullen (1976.[forrás?] – ) ausztráliai színésznő. Apja Max Cullen színész. Habár több filmben és TV sorozatban is feltűnt, leginkább színházi szerepeiről vált ismerté. A McDonald College és az Ensemble Studios-nál tanult, Sydneyben. Számos ismert darabban szerepelt, mint pl. „Black Comedy”, „Humble Boy”, ”The Importance of Being Earnest”, és „The Vagina Monologues” (Vagina monológok).
Az 1990-es évek elején főszerepet kapott a Magyarországon is játszott „A jövőből jött lány” (The Girl From Tomorrow) és annak folytatása „A holnap vége” (Tomorrow’s End) c., 2x12 részes sorozatban.
1985-ben Katharine, mint háttérszínész feltünt a Mad Max Beyond Thunderdome c. filmben.
Silverthorn is a villain from the year 2500. Silverthorn's most noticeable traits are his deviousness, and violent tendencies. Contrary to these though, he can be very charming, but this is all a front so he can double-cross people. He kidnaps Alana and flees to 1990, where he hopes he can rule the world.
Jenny is from 1990. She is a typical teenager going through her rebellious phase. She has dyed her hair purple and plays the drums, she has aspirations of joining a band. When she's not at school she helps out in her mum's deli. Jenny hates living in Sydney, but when Alana arrives things started getting interesting.
Petey is like any other ten year old boy from 1990. He is the brother of Jenny. He enjoys dressing up in his home-made superhero outfit, and calls himself "Captain Zero". Petey also has a great love of Science Fiction, which comes in handy when things get tough.
Irene is Jenny and Petey's mother. She is the owner of the Kelly Deli. Like most mums, she is very protective of her children, so much so that she is more than willing to stand up to Silverthorn alone in order to protect them.
James is the science teacher at Jenny's high school. Irene fell for him when she met him after enrolling Alana in Jenny's school. James helped all the others in their efforts to retrieve the Capsule so Alana could return home.
