
Acting
Melvin Kenneth "Mel" Smith (December 3, 1952 – July 19, 2013) was an English comedian, writer, film director, producer, and actor. He is most famous for his work on the sketch comedy shows Not the Nine O'Clock News and Alas Smith and Jones along with his comedy partner Griff Rhys Jones.
Description above from the Wikipedia article Mel Smith, licensed under CC-BY-SA, full list of contributors on Wikipedia.

Mel Smith: I've Done Some Things
as Self (archive footage)

My Angel
as Uncle Richard

Rock & Chips
as DI Thomas

Not Again: Not the Nine O'Clock News
as Self

The Riddle
as Professor Cranshaw

Consenting Adults
as David Maxwell Fyfe

Bottom Mindless Violence
as Jumbo Whiffy (archive footage) (uncredited)

The Best of Not the Nine O'Clock News Volume Two

Blackball
as Bowls Commentator (voice)

The Best of Not the Nine O'Clock News Volume One

Dancing on the Edge
as Schlesinger · 5 ep.

Rock & Chips
as DI Thomas · 3 ep.
The Smith & Jones Sketchbook
6 ep.

Agatha Christie's Marple
as John Enderby · 1 ep.

Hustle
as Benny Frazier · 1 ep.

Celebrity Mastermind
as Himself · 1 ep.

Timeshift
as Self - Not the Nine O'Clock News, 1980 (archive footage) · 1 ep.

Parkinson
as Self · 1 ep.

Colin's Sandwich
as Colin Watkins · 12 ep.

Going Live!
as Self · 1 ep.
Live Aid
1985