The Strike - S9-E10
Visible crew/equipment: When Jerry is chasing after Gwen and when he returns to the table, you can see the shadow of the boom mic on the wall. It is most noticeable to the right of the framed picture. (00:20:57)
Visible crew/equipment: After Elaine gets out of the taxi, she starts walking on the sidewalk, before chasing after the taxi once it drives away. The reflection of the filming crew can be seen in the windows of the buildings next to her when she starts walking. (00:06:32)
Answer: The name is Delores. He shouts that name at the end of the episode. Then in a later episode, "The Foundation", he runs into her. And he repeatedly calls her Delores.