Ranked #3 of 36 in Season 8•+0.7 vs season avg
The Gardners, the Martins' new neighbors, accuse Lassie of killing their cat and attacking their sheep, but Lassie knows there's a strange collie in the area.
June Lockhart
Ruth Martin
Jon Provost
Timmy Martin
Hugh Reilly
Paul Martin
Josh Albee
Mike Bishop
Tommy Rettig
Jeff Miller
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"The Mysterious Intruder" is episode 3 of Lassie season 8. It scored 8.0/10 from 23 votes, ranking #3 of 36 episodes this season (season average 7.3). It aired on September 24, 1961.