Bonanza - Season 1 - Eps 29: Bitter Water
Len Keith, a miner, wants to purchase some land adjacent to the Ponderosa from rancher Andy McKaren. Andy's son, Tod, is anxious to sell. Keith has offered him a partnership,and more importantly, he is in love with Keith's daughter. When Ben warns Andy that a mine on the property would foul up Ponderosa water, Andy agrees not to sell the land. Len Keith, determined to get that land, plants tick infested cattle in a Ponderosa herd to turn Andy against the Cartwrights.
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