Stiv drove Gracia Flynn and his team to Mason Industries to steal the time machine. Stiv was also the one who abducted Anthony Bruhl at gunpoint and forced him to board the Mothership.
In 1937, Stiv was sent by Flynn to stop Wyatt Logan, Lucy Preston, and Rufus Carlin from saving the Hindenburg from a timebomb that Flynn had planted on it. Stiv attempts to kill Kate Drummond and Wyatt to prevent them from disarming the bomb, but his is unsuccessful. In the altered timeline, Stiv and Kate Drummond are the only fatalities related to the Hindenburg disaster. Stiv's body is unable to be identified because he died in a time period before he was born.