Episode 1
Vol. 1 Enter the railroad rainbow line.
The Shadow Line return after being imprisoned for thousands of years. The Marshalls' father has somehow disappeared after their interference with the shadow line, their father has prepared them to become:
Power Rangers Rail Squad!
Episode 2
Vol. 2: Big Brother in Need.
While David is still feeling depressed with his father's disappearance, he befriends with a young boy who's lonely but scared by a shadow monster who challenges anyone to a duel fight.
Episode 3
Vol 3. We are family.
As Andrea got kidnapped by the Chain Shadow Monster, the power rangers are racing to rescue the hostages as Helen is having flashbacks about her & Andrea and how they end up getting adopted by Andrew Marshall.