Other visitors

In the whole "Through the Valleys" series, there are some visitors from railways other then the SVR and Swanage Railways. Most were operational.

Henry George
Henry George is a BR-built LMS Ivatt 2 2-6-2T locomotive who visited the South Western Heritage Railway from the Keighley & Worth Valley Railway in 1983. He returned to the railway with Purbeck in 2004.

Bio
Henry George was named after his designer (Henry George Ivatt) and built by Crewe works for British Railways in 1949 Built to a LMS design, Henry George was a suburban locomotive but was classified a mixed-traffic locomotive by his designer. He first went to Bath Green Park on the famous Somerset & Dorset Joint Railway (where Darren use to work) and was withdrawn from Skipton in 1966. Henry George was purchased by the Keighley & Worth Valley Railway (K&WVR) in 1967 in running order and painted in the railway's maroon livery, but didn't appear in 'The Railway Children' in 1970 due to his utility design. In 1983, he can to work the South Western Heritage Railway's first gala week with NYMR 0-6-0 Wilson, SVR 0-6-0PT Talywain and SWHR 0-6-0T Billinton. In 2004, Henry George returned to the railway with a classmate, Purbeck. Both of them did a role in the Southern Region gala of 2004. Both left after the gala ended.

Real locomotive
In real life, BR-built Ivatt 2 tank No: 41241 is owned by the Keghley & Worth Valley Railway and has run on different railways across the United Kingdom. Unlike some of his class, he never worked in the Southern Region of British Railways.

Liveries
During his first visit to the SWHR, Henry George was painted in the K&WVR's red livery.

On his second visit (with Purbeck), Henry George was painted in BR lined black with "ferret & dartboard" Late Crest.

Trivia
Henry George is named after his designer, Henry Arthur Ivatt.

Theo & Otto
Theo & Otto are two twin 0-4-0STs loaned from the Dark Railway during the 2011 gala week. They are mischievous and known to not take things seriously (in Billinton's mind).

Bio
Theo & Otto (short for 'Theodore' and 'Otthaneil') are two identical saddle tanks loaned from the Dark Railway in 2011 as the main visitors during the SWHR's second gala week in 2011. The moment they arrived, Billinton had suspicion on the twins as causes of trouble. After the gala ended, both were returned to the DR.

Basis
Theo & Otto are based on a pair of 1893-built Hawthorn Leslie 0-4-0ST locomotive for industrial use.

Trivia
Theo & Otto are really characters in Dark DJ Productions' 'The Dark Railway Series' and are described as bonkers scientists.

Eddie
Eddie is a Collett goods 0-6-0 tender locomotive from the Dark Railway. He was the main visitor for the 1994 gala week. Millie is his younger sister.