Bonanza: Under Attack is
a 1995 TV-movie sequel to the 1959 television series Bonanza and
made-for-television films Bonanza: The Next Generation (1988) and
Bonanza: The Return (1993). The TV-movie was directed by Mark Tinker
and features noted character actors Ben Johnson, Jack Elam, Dennis
Farina, Dirk Blocker, and Richard Roundtree, as well as Leonard
Nimoy. None of the characters from the original series appear since
the entire cast, with the exception of Pernell Roberts, was dead.