Teaser on this episode is for 1x14 "Attack of the Monster Plants". I presumed the transfer used was taken from a re-broadcast that was not done in-order, and that's why we get a preview we already saw at the end of 1x13 "One of Our Dogs Is Missing". But IMDB's trivia section answered the question in a way I didn't expect:
This episode exists with two different cliffhangers at the end. One is in black and white and is the segue for Lost in Space: Attack of the Monster Plants (1965), which began the first season repeat cycle during the series' initial run on CBS. The other is in color and is the segue for Lost in Space: Blast Off Into Space (1966), the first episode of the second season, which is in color. In syndication, the black and white version was used for many years, even though "Blast" usually followed "Follow" in repeat airings on local stations. The color version is used in the DVD release and during current (2013) airings on MeTV.
Shout by dgwVIP 10BlockedParent2018-12-01T05:06:21Z
Teaser on this episode is for 1x14 "Attack of the Monster Plants". I presumed the transfer used was taken from a re-broadcast that was not done in-order, and that's why we get a preview we already saw at the end of 1x13 "One of Our Dogs Is Missing". But IMDB's trivia section answered the question in a way I didn't expect:
Interesting that Hulu appears to use the original broadcast version, rather than the DVD version.