Two-Part Episodes

In the Dragons televison series, they have two-part episodes that are usually the 10 & 11 and 19 & 20 episodes of the season.

Main

 * Heather Report
 * We Are Family
 * A View to a Skrill
 * Cast Out
 * Dragon Eye of the Beholder
 * Have Dragon Will Travel
 * Night of the Hunters
 * Edge of Disaster
 * Maces and Talons

Other

 * In Dragons We Trust / Alvin & the Outcasts

Trivia

 * In Dragons We Trust and Alvin & the Outcasts are the only two-parts that don't share the same name. They are also the only ones that aren't in the middle or the end of the season, prior to Race to the Edge.
 * The Outcasts are featured in all of them in the first two seasons.
 * As of A View to a Skrill Part I, Dagur the Deranged has been in them.
 * All the main first part episodes end with someone captured.
 * Heather was captured by the dragon riders (Heather Report Part I).
 * Hiccup and Toothless were captured by the Outcasts (We Are Family Part I).
 * The Skrill was captured by Alvin and Savage (A View to a Skrill Part I).
 * Stoick was captured by Dagur (Cast Out Part I).
 * The Dragon Riders were trapped on the sinking Reaper (Dragon Eye of the Beholder Part I).
 * Heather and Windshear were nearly captured by Dagur (Have Dragon Will Travel Part I).
 * Astrid, Fishlegs, the twins, and their dragons were captured by the Dragon Hunters (Night of the Hunters Part I).
 * Ruffnut were captured by Ryker Grimborn and the Dragon Hunters (Edge of Disaster Part I).
 * Heather, Windshear, and the Flightmare are captured by Viggo (Maces and Talons Part I).
 * In the first two seasons, Alvin has minor parts in the first episodes and a much larger role in the second, not counting Cast Out.
 * In both the season one and two finales, Hiccup teams up with an enemy (Mildew and Alvin) to save someone he loves (Toothless and Stoick).
 * In the first two seasons, all of the second parts take place on Outcast Island, or at least show it.
 * Edge of Disaster and Maces and Talons have the shortest timespan between them. Only two episodes.