Dan was Melinda Bardach's boyfriend in the Season 2 episode Safe. He was portrayed by actor Jake McDorman. Dan came to see Melinda and her mother insisted he fully decontaminate himself. He finally got to see Melinda, but she started suffering from anaphylactic shock. He called for her mother, who thought he was responsible. However, they tested Dan's semen and there was no trace of penicillin in it.