Jonas temporarily carries Daniel's intellectual role while remaining connected to Daniel's legacy.
Jonas joins SG-1 after Daniel's death in S5E21, while Daniel later returns and Jonas assists the team during S7E2 and S7E14.
Their partnership joins Carter's engineering expertise with Jonas's scientific knowledge.
Carter and Jonas investigate Goa'uld-linked deaths in S6E5 and work together on multiple technological and planetary crises.
O'Neill gradually accepts Jonas as a capable, if unconventional, member of the team.
After Daniel's death in S5E21, Jonas joins SG-1 and works with O'Neill during S6 missions.
Explore the full interactive character relationship map of Stargate SG-1