He made his screen debut with a bit role in the 1993 film Untamed Heart.
Kartheiser found himself cast in mostly family fare, including The Indian in the Cupboard (1995) and a starring role in the film Alaska (1996).
The initial set-up for the series was a world in which 2% of the global population had simply disappeared all in the same instant, and how those left behind cope with the idea of the Sudden Departure.
The final season will bring back Theroux, Coon, Amy Brenneman, Kevin Carroll, Christopher Eccleston, Scott Glenn, Lindsay Duncan, Regina King, Jovan Adepo, Janel Moloney, Margaret Qualley, Jasmin Savoy-Brown, Liv Tyler, and Chris Zylka.
What they will say, though, is that the episode includes flashbacks detailing how the Administration came to be.
Donna's United States citizenship is briefly revoked after the Minnesota town in which she was born ends up in Canada due to border changes.
It's a style of storytelling that really appeals to me.
I think we're gonna do that a lot next year--have [those] two parallel things going.
The film led to Kartheiser getting the lead role in Masterminds the following year.
He next portrayed Bobby, a drug-addicted, homeless street urchin in Larry Clark's Another Day in Paradise.