It should noted that the following characters do not owe their origins to the Awdrys, but were created exclusively for the television series by Britt Allcroft, David Mitton and later, HiT Entertainment. Many thanks to Tom Wright for the initial preparation of this page. I haven't seen many of the videos or kept pace with the television series, so apologies in advance for errors and upkeep.

Legend to acronyms listed in main table
Acronym
Description
TATMR Thomas and the Magic Railroad
CAE Calling All Engines
TATGD Thomas and the Great Discovery
HOTR Hero of the Rails
MIR Misty Island Rescue

Introduced in

Character

Real engine, wheel arrangement

Standard Gauge 4' 8½"
Series 5

Derek

BR Class 17 Bo-Bo
Series 5

Iron 'Arry

BR Class 08 0-6-0
Series 5

Iron Bert

BR Class 08 0-6-0
TATMR

Diesel 10

Western Region B-B "Warship" plus non-regulation grab
TATMR

Splatter

BR Class 08 0-6-0
TATMR

Dodge

BR Class 08 0-6-0
TATMR

Lady

Fantasy Engine "0-4-0 side tank of uncertain lineage and toy-like appearance"
Series 6 Salty

BR Class 07 0-6-0 dock shunter
Series 6

Harvey

Dübs 0-4-0 crane engine
Series 7

Emily

GNR Stirling "Single" 4-2-2
Series 7

Murdoch

BR standard 9F 2-10-0
Series 7

Spencer

LNER A4 4-6-2 (de-streamlined)
Series 7

Fergus

Aveling & Porter 2-2-0WT "The Blue Circle"
Series 7

Arthur

LMS Ivatt 2MT 2-6-2T
Series 9

Dennis

BR Bulleid diesel 0-6-0 Ashford shunter "No. 11001"
Series 9

Molly

GER Claud Hamilton 4-4-0
Series 9

Neville

SR Bulleid Q1 0-6-0
Series 10

Rosie

SR USA Class 0-6-0T
Series 11

Billy

Manning Wardle L Class 0-6-0ST
Series 11

Whiff

Wilson Worsdell X1 2-2-4T LNER No.66 "Aerolite"
TATGD

Stanley

Fantasy Engine? To be determined 0-6-0ST
Series 12

Hank

Pennsylvania RR Baldwin K-4 Pacific 4-6-2
Series 12

Flora

1904 Birmingham Coorporation 0-6-0 steam tram - Moseley Road Tramway
HOTR

Hiro

Modified gauge for feature based on Japanese National Railways Class D51 2-8-2
HOTR

Victor

Modified to narrow gauge for feature based on single-build standard gauge Baldwin 0-4-0ST-T Minaz No.1173 (plate No.42671) built in 1915 for the Carlos Manuel de Céspedes Sugar Mill, Cuba.
Series 13

Charlie

Manning Wardle L Class 0-6-0ST
MIR

Bash & Dash

Modified to standard gauge (from narrow gauge) for feature based on "Gypsy" Class 0-4-0 No.1 engine owned by the Bear Harbor Lumber Company, California
MIR

Ferdinand

Modified to standard gauge (from 3' gauge) for feature based on Climax C Class (pre-1910)

Rolling stock
Series 5

Old Slowcoach

Great Western clerestory brake coach
Series 10

Rocky the Steam Crane

Ransomes and Rapier 45-ton steam breakdown crane

Narrow Gauge 2'3" (unless stated otherwise)
Series 4

Smudger

Fletcher Jennings 0-4-0 (as "Rheneas")
Series 5

Bertram (or Bertrum)

George England 0-4-0 (as "Duke")
Series 9

Mighty Mac

Double Fairlie 0-4+4-0 (Festiniog Rwy)
Series 10

Fearless Freddie

Hunslet 2-6-2T (Welsh Highland Rwy "Russel")
HOTR

Victor

Modified to narrow gauge (from standard gauge) for feature based on single-build Baldwin 0-4-0ST-T Minaz No.1173 (plate No.42671) built in 1915 for the Carlos Manuel de Céspedes Sugar Mill, Cuba.

Steam road vehicle
Series 6

Elizabeth

Sentinel steam lorry

ICE and other misc. vehicles / equipment
Series 5

Cranky the crane

Dock yard electric crane of no particular prototype
Series 5

Horrid Lorries

Foden lorries?
Series 5

Thumper the Quarry machine

Fantasy vehicle of no particular prototype
Series 5

Butch the breakdown truck

Scammel tank recovery vehicle?
Series 6

Jack

Possibly a JCB?
Series 10

Jeremy

Britsh Airline Corp. One-Eleven (BAC-111) Jet airliner
Series 11

Madge

Scammell Scarab 6-ton tractor lorry (1965-67)
Series 12

Colin the Crane

To be determined class of stationary steam crane / derrick
HOTR

Kevin

Ransomes and Rapier 6 ton crane
MIR

Captain

Ex-Royal National Lifeboat Institution (RNLI) Liverpool Class Lifeboat

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Awdry Engines