Cal Langley

Cal Langley is a fictional character in the television series "Roswell", portrayed by Joe Pantoliano.
Biography.
Cal is an alien from the planet Antar, a servant of that planet's ruler Zan. When Zan, his wife Ava, his sister Vilandra, and Vilandra's betrothed spouse Rath were killed by a revolution brought on by their enemy Kivar, Langley (his Antarian name is unknown) was part of a plan to return the "Royal Four" to the power. The followers of the Royal Four copied their DNA and mixed it with that of inhabitants of the planet Earth. They created two sets of these clones, as a security measure. The embryos of the clones were sent to Earth with Langley and another follower, known later on Earth as Nasedo (his Antarian name is also unknown). Langley and Nasedo would each take their respective set of clone embryos, which would take over fifty years to gestate, to a separate location on Earth, and raise them there. When they reached adulthood, one set of them was to be taken back to Antar to depose Kivar and rule once again.
After the ship crashed, Langley took his embryos to New York City, and placed them in a storage locker. But, after years of living on Earth, disguised as a human, he decided to neglect his duty as protector, and did not oversee the hatching of the pods. His clones of the Royal Four therefore grew up on the streets of New York. Langley kept tabs on them, however, as well as the group that grew up in Roswell. He went on to become a wealthy Hollywood producer and four-time Academy Award winner.
In 2001, the Roswell clone of Zan, now known as Max Evans, showed up at his doorstep, claiming that he had conceived a son with the Roswell clone of Ava, but that she had departed for Antar with him, and begged Langley to help him find a way to Antar in order to save his son. When Langley refused, Max discovered he had the ability to order Langley to do anything, and forced him to find the spaceship that brought them to Earth and pilot it back to Antar. The ship would not work, however, due to the damage from the crash, and his attempt at making it work had cost Langley his human senses. He cursed Max for doing this to him, and returned to his estate.
Original Novels.
Months later, however, Max showed up at his house again, this time with his Earth wife Liz Parker, as well as the Roswell clones of Vilandra Isabel Evans, and Rath, Michael Guerin, and their Earth friends Maria DeLuca, Kyle and Jim Valenti, Isabel's husband Jesse Ramirez, and FBI agent Suzanne Duff, asking for his help in evading the Special Unit of the FBI that was after them. Langley reluctantly followed them into the Special Unit's base, where they found the New York clone of Ava, the last of her Royal Four. Using her powers along with those of Kyle Valenti and Isabel, Langley managed to cause a mass mind-warp, erasing the knowledge of alien existence from the minds of the entire Special Unit. 
After the adventure, Langley attended the official wedding of Max and Liz, where he offered Michael the chance to become a Hollywood superstar, and for his girlfriend Maria to become a famous singer. Michael and Maria subsequently moved to L.A. with Langley to begin their respective careers.