The Season 9 premiere features an historic rail line on the Northern California coast; a garden layout in the Denver area; a Missouri tourist line; and the spot where the final spike in the transcontinental rail line was driven in.

A tourist line in eastern Pennsylvania; a layout honoring one of the longest rail lines in the country; a collector who specializes in repurposing industrial rail parts; and the Colorado Rail Museum.

The Old Patagonian Express in Argentina; the O. Winston Link Museum in Roanoke, Va.; and the Oregon Coast Scenic Railroad. Also: a man whose layout ideas come from his own railroad history.

Steam trains in Iowa; an N-scale layout in northern Indiana; a Philadelphia-area arboretum's garden railroad; and a Virginia "railwalk" that honors the history of trains and the region.

A Saxon-inspired layout; a garden railroad in northern Kentucky; and a mountain railroad in Japan. Also: a Wisconsin rail artist.

An Ohio rail-themed park with a large indoor train display; rail features in rural Wisconsin; and a privately owned O-gauge track. Also: preserving Pennsylvania's steam heritage.

An Indiana arboretum that embraces rail history; the Columbia Star dinner train; a layout in Iowa that's a link to the owner's past; and a train that makes Hollywood magic come to life.

An F-gauge layout in the Pacific Northwest that showcases the beauty of a Colorado narrow gauge; a Pennsylvania murder-mystery train; an Illinois garden layout; and an East Coast tourist line.

How a horticultural conservatory plans, constructs and runs its trains. Also: a Christmas-themed layout; a toy museum; and a New England steam line.

A German-themed LGB layout; a military-themed layout in Colorado; the unique Galloping Goose rail car; and an Ohio rail club.

The Golden Eagle in Russia; an Indianapolis "HO" gauge; an interactive Cincinnati layout that brings New York's Coney Island to life; and the historic coal-powered, narrow-gauge line of the Tweetsie Railroad.

The Iowa Interstate Railroad; an Arizona garden railroad; and the Iowa Slim Princess.

The Season 9 finale features six layouts created by a pair of California twins; a Seattle Sn3 layout; the National Railroad Museum in Green Bay; and a train that treks through the original oil fields of the U.S.