Melinda’s mother
Melinda’s mother, Beth Gordon, has the ability to communicate with ghosts, but chooses not to. She appeared in the episodes “Melinda’s First Ghost”, “The Vanishing”, “The Underneath”, and “Pater Familias”. She was portrayed by Anne Archer.

Melinda’s Grandmother
Melinda’s grandmother, Mary Ann, as well Melinda and Melinda’s mother, was a person who spoke to ghosts. She was the one who gave lost spirits the title “earthbound”. She helped them cross over in the Light (Heaven). She is deceased. Her gift was passed down to Melinda who is the current “ghost whisperer”. Sometimes Melinda’s Grandmother crossed over into the Light so she is currently a “Light” Spirit. She helps Melinda bring ghosts to peace through dreams in two episodes: “Voices” and “The Gathering”. It is later revealed in Season 3 that Melinda’s great great great grandmother, Tessa (through her mother’s side), can also communicate with ghosts and whom Melinda helps to crossover. She was portrayed by June Squibb.

Charlie Banks
Delia was married to Charlie Banks until he died three years prior to Delia’s first appearance on the show. They had a loving relationship. After a fire at the place that Charlie worked, Charlie was said to be different and more of a family man. We also learn that it was Tim who saved Charlie’s life. Together with Charlie, Delia had her twelve-year-old son, Ned. Charlie Banks was portrayed by Fredric Lehne. He died after being shot to death.

Laughing Man
Not much is known about who the Laughing Man is. It is known, that he usually appears with Romano and that he is a ghostly agent for the dark side. He wears a three-piece suit and is usually seen laughing. He was portrayed by Douglas Bierman.

Bleeding Man
Like the Laughing Man, not much is known about the Bleeding Man. He is a dark spirit whose right hand is bleeding, hence his name. He first appeared at the end of Love Still Won’t Die. So far, he has not appeared in any episodes with either Romano or the Laughing Man. He was portrayed by Lou Glenn.

Tim Flaherty
In the episode “The Walk-In”, Tim Flaherty, a friend and co-worker of Jim’s, is trying to get Delia to go out on a date with him, something Delia refuses to do. In “Delia’s First Ghost” Tim tries to get Jim to tell him what Delia likes so he can impress her. Charlie, Delia’s dead husband, helps him by knocking over a pot of lavender roses that Delia likes. Tim also buys a motorcycle exactly like the one Charlie used to have. At the end of the episode, they are seen walking away hand in hand. He reappears in the fourth season in the episode Threshold. He is at Jim’s funeral and talks about Jim before turning on an ipod with rock music which he says Jim would have wanted. He is portrayed by Thomas Wilson.

Tom Gordon
Tom Gordon first appears in the plot in season two’s finale, however he had previously appeared in some flashbacks. When Melinda “dies” in season two’s finale, she confronts an already dead Tom, who tells her she is ready to find the darkness within herself, and also tells her she has a brother, who is later revealed to be Gabriel. In season three, Tom has contact with both Melinda and Gabriel, manifesting himself in Melinda’s dreams, and speaking as a ghost with Gabriel. It has been suggested that Tom is part of the Dark Side, and that he is developing a plan to get Melinda into the Dark Side. However in the 2nd to last and final episode in the 3rd series Tom Gordon is found alive in Gabriel’s home. She later finds out that every time she had seen his ghost his body had, in fact, been taken over by Paul Eastman when he was trying to kill him. Melinda then finds out that Tom is, in fact, not her father but Paul Eastman is. After finding out this shocking truth, Melinda goes to the main square in town to think, where Tom meets her. He asks her to come back to the house that she grew up in. There he gets her to go back through her memories to the night that he murdered Paul Eastman. She realises that Tom is just a cold-blooded killer. He then informs her that he now has to kill her. Paul Eastman then arrives and takes over Tom’s body one last time and throws himself over the staircase killing him. He was portrayed by Martin Donovan.

Paul Eastman
Paul Eastman first appears in Melinda’s dreams as someone who haunted her and/or wanted to haunt her. But, in the season 3 finale, it’s revealed that he is Melinda’s biological father, not Tom Gordon. Paul set a series of ‘clues’ to help Melinda see the truth. To quicken the process and save Melinda, he convinced her mother to tell Melinda the truth. Melinda was initially in disbelief and was consoled by Tom, who convinced her to follow him to a safe place. The ‘safe’ place was Melinda’s childhood home and Paul Eastman’s burial site. Once, they arrived Tom probed Melinda about her memory of Paul’s death, she eventually had a flashback revealing that Tom deliberately killed Paul. Tom decided that he must kill Melinda to protect himself from the truth being revealed. Melinda cried out to her Dad. Tom said ‘I’m not your Dad’. to which Melinda replied ‘I wasn’t talking to you’. At which point, Paul entered Tom’s body and forced him to fall to his death. Paul talked to Melinda and her mother, then went into the Light. He was portrayed by Corin Nemec.

Courtesy of Wikipedia.