Nikolai Rozhenko is a character on
Star Trek: The Next Generation played by Paul Sorvino.
Nikolai is the son of Sergey and Helena Rozhenko and adoptive brother of Worf. In 2357, both brothers entered Starfleet Academy but Nikolai ended up dropping out and ended up working as a scientist and cultural observer. In, 2370 he was assigned to observe the Boraalans on Boraal II. When the Enterprise-D came to check on him after the planet began to become unlivable, Nikolai used the Enterprise's holodecks to transport the Boraalans to another planet and fathered a child with a Boraalan named Dobara.
The Star Trek Project
Homeward - ST:TNG
Sources:
http://www.startrek.com