Blake Barris played Nick Fallon, the son of Jessica Fallon (Marie Horton's daughter) and her husband, Joshua. He came to Salem as a young adult, a geeky genius. In a nutshell, he killed someone, did time in prison, got released and came back to Salem, got involved with and married Gabi and pretended to be the father of her baby when she got pregnant with Arianna, and blackmailed Will to keep quiet about the fact that he was really the father.
A few years later (after Gabi and Nick divorced), Gabi thought she killed him (but didn't really), then she, Sami and Kate threw his body into the freezing Salem River, he was rescued by Percy the bird watcher, then came back to Salem to terrorize the ladies, became obsessed with Gabi and tried to rape her, so she shot and killed him for real. Julie was especially fond of her young cousin and often referred to him as her darling Nicky. She refuses to acknowledge that Nick was trying to rape Gabi when she shot/killed him, so that started Julie's hatred of Gabi.
Jordan Ridgeway was the physical therapist Kate found to take care of Rafe after he was beaten and left in a coma for many weeks. Since she was so quiet and not much was known about her, plus Kate was getting jealous of Jordan's growing friendship with Rafe, Kate began digging into Jordan's past and brought her abusive rapist stepfather (Clyde) to town. Jordan eventually left town, but came back a few years later as a bat-crap crazy loon.
Jordan had given birth to Christian/Evan's child (Baby David, who Rafe tried to adopt; eventually custody was given to Christian/Evan's sister Zoey). Christian/Evan is Orpheus' crazy son, who Rafe had originally hired to be baby David's nanny. Christian/Evan killed Jordan (but Ben was accused). Christian/Evan went on to impregnate crazy Jan Spears and they have a son, Shawn Christian.