Frank Black is a character on the acclaimed TV show Millennium
created by Chris Carter
of The X-Files
Frank is a retired FBI
agent who specialized in criminal profiling
. It was a profession he excelled at due to his unique ability to literally "see inside the mind of a killer
After moving to Seattle with his wife Catherine Black and daughter Jordan Black, he offered his services to the local police department via the Millennium Group, an organization that said pre millennial fever was responsible for the increase in crime.
As a result of his submersion into the Group he separated from his wife. He eventually came to the realization that the Millennium Group were dangerous people who eventually would unleash a deadly virus that would kill both his wife and his friend, Lara Means.
After Catherine's death, Frank and Jordan moved to Falls Church, Virginia, where he resumed work for the FBI and was teamed with the inexperienced Emma Hollis.
Emma eventaully betrayed his trust and joined the Group. Soon after Frack left his job and his home with his daughter, the reason probably linked to a folder full of information given to him by Peter Watts.