Bakers Dozen - TV SERIES - (Miniseries no less than 3 parts)

13 TV shows where one of the cast members played multiple roles (either as a regular thing or one-time or occasional occurrence).

01. Smallville - Tom Welling played Clark Kent, Bizarro, and Clark Luthor.
02. The Flash - Tom Cavanagh plays various versions of Harrison Wells and Eobard Thawne (Reverse Flash)
03. Family Matters - Jaleel White plays both nerdy Steve Urkel and his cool doppelganger Stefan Urquelle.
04. The Patty Duke Show - she played Patty and her "identical cousin" Kathy
05. Only Fools and Horses - sitcom characters played characters from "Omen" in a dream sequence.
06. Bonanza - Two episodes feature Lorne Greene as both Ben Cartwright and his evil doppelganger Bradley Meredith.
07. Everybody Loves Raymond - one episode where Patricia Heaton & Ray Romano played Ray's parents Marie & Frank as younger people

13 TV shows where one of the cast members played multiple roles (either as a regular thing or one-time or occasional occurrence).

01. Smallville - Tom Welling played Clark Kent, Bizarro, and Clark Luthor.
02. The Flash - Tom Cavanagh plays various versions of Harrison Wells and Eobard Thawne (Reverse Flash)
03. Family Matters - Jaleel White plays both nerdy Steve Urkel and his cool doppelganger Stefan Urquelle.
04. The Patty Duke Show - she played Patty and her "identical cousin" Kathy
05. Only Fools and Horses - sitcom characters played characters from "Omen" in a dream sequence.
06. Bonanza - Two episodes feature Lorne Greene as both Ben Cartwright and his evil doppelganger Bradley Meredith.
07. Everybody Loves Raymond - one episode where Patricia Heaton & Ray Romano played Ray's parents Marie & Frank as younger people
08. The Second Hundred Years - Monte Markham played both Luke and Ken Carpenter
09. Bewitched - Elizabeth Montgomery played Samantha and her twin cousin Serena

13 TV shows where one of the cast members played multiple roles (either as a regular thing or one-time or occasional occurrence).

01. Smallville - Tom Welling played Clark Kent, Bizarro, and Clark Luthor.
02. The Flash - Tom Cavanagh plays various versions of Harrison Wells and Eobard Thawne (Reverse Flash)
03. Family Matters - Jaleel White plays both nerdy Steve Urkel and his cool doppelganger Stefan Urquelle.
04. The Patty Duke Show - she played Patty and her "identical cousin" Kathy
05. Only Fools and Horses - sitcom characters played characters from "Omen" in a dream sequence.
06. Bonanza - Two episodes feature Lorne Greene as both Ben Cartwright and his evil doppelganger Bradley Meredith.
07. Everybody Loves Raymond - one episode where Patricia Heaton & Ray Romano played Ray's parents Marie & Frank as younger people
08. The Second Hundred Years - Monte Markham played both Luke and Ken Carpenter
09. Bewitched - Elizabeth Montgomery played Samantha and her twin cousin Serena
10. Friends - David Schwimmer played Ross and his lookalike Russ (credited as "Snaro")
11. Taxi - Andy Kaufman played Latka Gravis / Vic Ferrari 

13 TV shows where one of the cast members played multiple roles (either as a regular thing or one-time or occasional occurrence).

01. Smallville - Tom Welling played Clark Kent, Bizarro, and Clark Luthor.
02. The Flash - Tom Cavanagh plays various versions of Harrison Wells and Eobard Thawne (Reverse Flash)
03. Family Matters - Jaleel White plays both nerdy Steve Urkel and his cool doppelganger Stefan Urquelle.
04. The Patty Duke Show - she played Patty and her "identical cousin" Kathy
05. Only Fools and Horses - sitcom characters played characters from "Omen" in a dream sequence.
06. Bonanza - Two episodes feature Lorne Greene as both Ben Cartwright and his evil doppelganger Bradley Meredith.
07. Everybody Loves Raymond - one episode where Patricia Heaton & Ray Romano played Ray's parents Marie & Frank as younger people
08. The Second Hundred Years - Monte Markham played both Luke and Ken Carpenter
09. Bewitched - Elizabeth Montgomery played Samantha and her twin cousin Serena
10. Friends - David Schwimmer played Ross and his lookalike Russ (credited as "Snaro")
11. Taxi - Andy Kaufman played Latka Gravis / Vic Ferrari
12. My Three Sons - Fred MacMurray played Steve Douglas/Fergus McBain Douglas (4 episodes)
13. Northern Exposure - Multiple fantasy roles weren't uncommon on that program. But, in one episode "Cicely," all cast members played characters from the late 1800's, in a flashback history of the town where they lived.

UFG

TV Series set before the 19th century.

01. Lorna Doone
02. It's About Time

TV Series set before the 19th century.

01. Lorna Doone
02. It's About Time
03. TURN: Washington's Spies
04. The Black Adder

TV Series set before the 19th century.

01. Lorna Doone
02. It's About Time
03. TURN: Washington's Spies
04. The Black Adder
05. Outlander (I haven't seen this, but I understand most is set in the 1740's?)
06. Covington Cross

TV Series set before the 19th century.

01. Lorna Doone
02. It's About Time
03. TURN: Washington's Spies
04. The Black Adder
05. Outlander (I haven't seen this, but I understand most is set in the 1740's?)
06. Covington Cross
07. The First Churchills
08. Hercules: The Legendary Journeys

TV Series set before the 19th century.

01. Lorna Doone
02. It's About Time
03. TURN: Washington's Spies
04. The Black Adder
05. Outlander (I haven't seen this, but I understand most is set in the 1740's?)
06. Covington Cross
07. The First Churchills
08. Hercules: The Legendary Journeys
09. By the Sword Divided
10. Vikings