Helena and Artie's actions during Buried were odd to say the least. In the upcoming episode I see at least three possible scenarios unfolding: 1. Artie instigated the events surrounding Warehouse 2, as a part of a plan to avenge MacPherson's death at Helena's hand and to ultimately kill her.
2. Artie instigated the events involving Warehouse 2 as test of Helena's character and loyalties.
3. Helena being inconsolable at the loss of Christina is attempting to use the artifact being sought in Reset as leverage to force Artie, Pete and Myka to kill her in effect committing suicide by agent.