Bonanza - Season 2 - Eps 10: The Last Viking
Gunnar Borgstrom is the leader of a vicious band called the Commancheros. They burn houses, kill people and steal anything of value. When the Commancheros get to Nevada, Gunnar decides to visit his relatives, the Cartwrights. Meanwhile the gang capture Little Joe and his girlfriend. When Gunnar returns to the gang, he has no idea who Joe is because he'd never met his nephew before.
About Bonanza

Title: Bonanza
First Air Date: 1959-09-12
Last Air Date: 1973-01-16
Status: Ended
Rating: 7.5/10 (from 440 votes)
Language: EN
Seasons: 14
Total Episodes: 431
Network: NBC
Genres: Western, Action & Adventure, Drama, Family
Production Companies: NBC, NBC Studios
Synopsis
The High-Sierra adventures of Ben Cartwright and his sons as they run and defend their ranch while helping the surrounding community.
Cast

Lorne Greene
Ben Cartwright

Michael Landon
Joe Cartwright

David Canary
Candy Canaday

Tim Matheson
Griff King

Mitch Vogel
Jamie Hunter Cartwright