The X-Files
[Characters]Special Agent Fox MulderAssigned to: X-Files
Believer
Fox Mulder is an agent who leads the X-Files, a program within the FBI to investigate paranormal activities, usually involving aliens or the like. He is under the command of Assistant Director Walter Skinner and has a partner named Dana Scully.
Special Agent Dana ScullyAssigned to: X-Files
Skeptic
Dana Scully, also assigned to the X-Files, is a medical doctor and a skeptic. She was assigned to the X-Files to put Mulder's theories up to the test of science.
Assistant Director Walter SkinnerAssigned to: Management
Assistant Director
Walter Skinner is the assistant director of the FBI, who regularly corresponds with Mulder and Scully. He is a lot more common to see rather than say, the actual Director.
Many more characters but I don't want to give away the story!
[Backstory]Fox Mulder's sister, Samantha, was abducted when he was a small child. Since then Mulder has believed in everything paranormal, from aliens to telekinesis to mind readers. Mulder and Scully go on cases that are paranormal, and also trying to find out what happened to Samantha
The Truth Is Out There.(episodes available on Netflix if you have it).