This was Martha Hackett's (Seska) first appearance as Seska since "Basics, Part II". She made one final appearance in the final season episode "Shattered".

Martha Hackett (Seska) talks about her character's reappearance in "Worst Case Scenario": "Even when I had been off the show for a season and, you know, we pretty much thought Seska had disappeared, there she was. She came back to haunt them - in a very clever way, I thought - when they brought [her] back as a hologram. And [...] you know, it was kind of fun to go back to that, [to] bring all those storylines back up again. I thought it was great that she thought ahead and planned something that would mess with people even after she wasn't around."

"I was really pleased when they invited me back. I thought it would be great fun. It was really nice to go back and the cast were all very welcoming. Also, it was enough time after I'd had my baby, so I felt myself again and was more free to work. I had worked just after I had my son, but a bit too soon afterwards, and it was a little stressful. This episode was good timing."