Não tenho certeza se esta é a resposta certa ou há uma prova disso, mas eu assumo que é a mesma vez que eles foram inicialmente enviados de volta, que é 2027 e nessa linha de tempo, Alison ainda está viva e ninguém conhece John
Aqui está Derek wikia , ele nasceu em 1995 e tem 32 anos, o que significa que ele foi enviado de volta 2027.
e da Alison wikia
Following the deactivation of Cameron at the hands of John Henry, John Connor and Catherine Weaver jumped to 2027. However, this was an alternate timeline where John Connor never became leader of the Resistance. There they found Allison Young alive and well with Derek and Kyle Rees.
Edit: OK, isso não foi realmente correto. De este
Q: What year did John Connor and Catherine Weaver jump to?
A: Unknown. There was no display indicating the destined time period in John Henry's chamber, only a countdown clock. There is no official date given for their arrival in the episode; however, it could be assumed that it is either 2026 or 2027 by the ages of Kyle and Derek. We know only that it is sometime after Judgment Day. It could be, or may not be, before John Connor takes control over the Resistance. In this new timeline, it is possible John may not have existed (which is likely due to the transport as no one would have grown up to become John Connor).