Spy in the House of Love - S1-E9
Continuity mistake: When DeWitt talks to Dominic about some of the recent events regarding the Actives, DeWitt's left hand moves from hanging by her side to resting on her hip between shots. (00:03:35)
Visible crew/equipment: After Echo is extracted from the docks, the reflection of a camera rig can be seen on the side of Langton's van. It's within the last few frames of the shot so you may have to pause it to see.
Trivia: Before Dollhouse, Olivia Williams had a bit part as Moira McTaggert in X-men 3. She was showing a patient who had no conscience. Xavier then brought up the ethics of placing the conscience of one person into another which is what Ms. Williams does now as Ms. Dewitt in Dollhouse.