- A polar bear appears in Pilot 2. Sawyer, Kate, Charlie and Sayid encounter the bear in the jungle and Sawyer shoots it.
- Hurley was reading the comic book with the polar bear drawing while he was onboard the plane.
- Walt is reading Hurley's comic book during the Season One episodes which features a polar bear.
- Michael gives Walt a stuffed polar bear in a flashback in "Adrift".
- Two polar bears appear fighting on an ice floe in the Orientation Film - suggesting that the Dharma Initiative brought polar bears to the Island, and after the apparent demise of the Initiative, the bears were left to run wild.
- In "Special", Walt is hiding inside a banyan tree, which resembles a cage, with a polar bear ramming at them/him.
- A stuffed polar bear toy appears in the gigantic crib in which Drive Shaft film their commercial, "You All Every Butties", during the episode "Fire + Water".
- The Latin name for "polar bear" is ursus maritimus, which appears on the Blast Door Map in episode "Lockdown".
- In the episode "Dave", one of the patients at the Santa Rosa Mental Institute is playing with a stuffed polar bear toy while the others are playing basketball.
- It's possible that this experience was a Group Hallucination.
- The Blast Door reads: STATED GOAL, REPATRIATION ACCELERATED DE-TERRITORIALIZATION OF URSUS MARITIMUS THROUGH GENE THERAPY AND EXTREME CLIMATE CHANGE. This may mean that the polar bears were being changed physically so that they could live in the warm climate of the island. Note that "repatriation" means to "put something back where it came from", not "move". This may be a production team error.
- Polar bears have appeared on the website Bigspaceship1, which is not an official Lost site.
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