I was watching an episode of Lassie called "The Tooth" (Yes, it was on a "Homemade DVD") and I noticed the background music was the same one I've heard on several ZIV Titles including Bat Masterson, Highway Patrol, Science Fiction Theatre and Sea Hunt. Also on the Episode of Lassie called "The Disappearance" (Season 10 - this is the episode where the dawg is introduced to Forest Ranger Cory Stewart, who will become her new master a year later) the Airplane from the ZIV series Ripcord makes a Cameo Appearance. I know Lassie was not a ZIV Production. yet I sense some kind of connection. Does anyone out there know anything about this?