Once Upon a Time... The Explorers / Season 1 Season guide Once Upon a Time... The Explorers: Season 1 26 episodes Premiered Dec 10, 1996 Updated Oct 3, 2026 Spoiler-safe Advertisement Season 1 Episodes Episode Guide 🛡️ SPOILER SHIELD Season 1 Progress Shield All Safe I'm Watching Caught Up Season: Season 1 Last Watched: None (Not started) Episode 1 Episode 2 Episode 3 Episode 4 Episode 5 Episode 6 Episode 7 Episode 8 Episode 9 Episode 10 Episode 11 Episode 12 Episode 13 Episode 14 Episode 15 Episode 16 Episode 17 Episode 18 Episode 19 Episode 20 Episode 21 Episode 22 Episode 23 Episode 24 Episode 25 Episode 26 Future titles & synopses blurred. Tap "Reveal" on any card to peek. Binge Efficiency Engine Season 1: Filler vs. Essential Canon Filter episodes by narrative weight. Focus on essential mytharc and skip standalone side quests. 12% 88% Mytharc (3): Crucial lore & season climaxes Core (23): Character development & subplots Side Quest (0): Standalone / filler Show All (26) Crucial Mytharc (3) Essential Canon (26) S1·E1 Mytharc The First Navigators Dec 10, 1996 · 26 min S1·E2 Core Alexander the Great Dec 11, 1996 · 26 min S1·E3 Core Erik the Red and the Discovery of America Dec 12, 1996 · 26 min S1·E4 Core Genghis Khan Dec 13, 1996 · 26 min S1·E5 Core Ibn Battuta (in Marco Polo's footsteps) Dec 16, 1996 · 26 min S1·E6 Core The Great Junks Dec 17, 1996 · 26 min S1·E7 Core Vasco da Gama Dec 18, 1996 · 26 min S1·E8 Core The Taxis and the first Postal System Dec 19, 1996 · 26 min S1·E9 Core The Pinzon Brothers (The Hidden Side of Christopher Columbus) Dec 20, 1996 · 26 min S1·E10 Core Amerigo Vespucci Dec 23, 1996 · 26 min S1·E11 Core Ferdinand Magellan and del Cano Dec 26, 1996 · 26 min S1·E12 Core Cabeza de Vaca Dec 27, 1996 · 26 min S1·E13 Core Vitus Bering Dec 30, 1996 · 26 min S1·E14 Core Louis Antoine de Bougainville and the Pacifique Jan 1, 1997 · 26 min S1·E15 Core Bruce and the Nile Jan 2, 1997 · 26 min S1·E16 Core La Condamine Jan 3, 1997 · 26 min S1·E17 Core James Cook Jan 6, 1997 · 26 min S1·E18 Core Alexander von Humboldt Jan 7, 1997 · 26 min S1·E19 Core Lewis & Clark Jan 8, 1997 · 26 min S1·E20 Core Stuart & Burke and Australia Jan 9, 1997 · 26 min S1·E21 Core Stanley & Livingstone Jan 10, 1997 · 26 min S1·E22 Core Roald Amundsen and the South Pole Jan 13, 1997 · 26 min S1·E23 Core Alexandra David-Néel in Tibet Jan 14, 1997 · 26 min S1·E24 Core Piccard from the Mountain Tops to the Depth of the Sea Jan 15, 1997 · 26 min S1·E25 Mytharc Up to the Peaks Jan 16, 1997 · 26 min S1·E26 Mytharc Up to the Stars Jan 17, 1997 · 26 min Advertisement