| Issue | #20 |
| Published | January-February 1955 |
| Cover Price | 0.10 USD |
| Pages | 36 |
| Editing | ? |
| Notes | Indicia says "Published bi-monthly". |
| Characters | Lassie |
| Genre | Animal |
| Pencils | ? (painting) |
| Inks | ? (painting) |
| Colors | ? (painting) |
| Notes | Indicia says "Published bi-monthly". |
| Synopsis | Facts about the Spectacled Bear, the Coati, the Kinkajou, and the Patagonian Cavy. |
| Genre | Fact |
| Letters | Typeset |
| Characters | Lassie; Rocky; Gerry; Timbu; Captain Rios; Maria; Mateo |
| Synopsis | After their adventures in Peru (in issue #19), Lassie and her friends fly towards Quito in a chartered plane on their way to the USA. The plane is wrecked by debris from a volcanic eruption. |
| Genre | Animal; Jungle |
| Pencils | Matt Baker |
| Letters | Typeset |
| Notes | Pencils credits for this issue from Overstreet and Jerry Bails. Inks might be by Jack Abel, who inked Lassie in 1954-56 according to Jerry Bails. Unusually, there is no job number on page 1. /Martin Olsen |
| Characters | Lassie; Gerry; Rocky; Timbu |
| Synopsis | Arrived at New York, Gerry and Rocky leave Timbu and Lassie at the hotel for a while. Timbu takes Lassie for a trip of city exploration. |
| Genre | Animal |
| Pencils | Matt Baker |
| Letters | Typeset |
| Notes | See notes for sequence 2 about art credits. |
| Characters | Lassie; Gerry; Rocky; Timbu; Mr. Burt Carver; Ricky |
| Synopsis | Lassie and her friends go to Maine to visit Rocky's publisher, Mr. Carver, and his son Ricky. Ricky takes Timbu and Lassie on a sailing trip to catch giant tuna. |
| Genre | Animal |
| Pencils | Matt Baker |
| Letters | Typeset |
| Notes | Story ends on back cover. Inside back cover in black and white. See notes to sequence 2 about art credits. |