Full Cast — Marcus Welby, M.D. (1969–1976)

Robert Young

Dr. Marcus Welby

James Brolin

Dr. Steven Kiley

Elena Verdugo

Consuelo Lopez

Pamela Hensley

Janet Blake Kiley / Janet Blake

Sharon Gless

Dr. Susan Carr / Kathleen Faverty / Lynn Baker

JoAnna Cameron

Nurse Anne MacAndrews / Carolyn Kingsley

Elaine Devry

Ellie Hill / Shelia Bryant / Mrs. Braden / Loretta McKenna

Anne Schedeen

Sandy Porter / Mariette / Mrs. Elizabeth Carstairs

Greg Mullavey

Father Kling / Tom Dalton / Ed Putnam

Jerry Fogel

Jack Kramer / Mike Rossowitz / Marty Siegel / Dr. Steinberg

Tom Drake

John Kalscheur / Dave Tillerman / Homer Chatfield / George Appleton

Marco López

Anesthesiologist (uncredited) / Anesthesiologist / Jury Foreman (uncredited) / Marco

Marshall Reed

Carter / Mr. Peterson / Matt Callan

Belinda Montgomery

Mary Ann Graham / Susan

Dawn Lyn

Cara Anderson / Andrea Rolf / Shelia

Victor Izay

Dr. Chet Larkin / Dr. Bonner / Dr. Seth Rollins

Robert Emhardt

Jack Walthers / Alfred Mercer

Arnold F. Turner

Orderly / Hospital Orderly / Intern

Aline Towne

Nurse Cohen / Nurse Irwin / Nurse

Dorothy Green

Ruthie / Charlotte / Louise Janis

Anne Baxter

Myra Sherwood

Susan Clark

Ruth Ann Adams / Judy Graham

Sharon Acker

Nancy Mason / Margaret Loring

Peggy Rea

Mrs. Baker

Barbara Rush

Nadine Cabot / Dorothy Carpenter

Kaz Garas

John Christopher / Alex Kovak

Pernell Roberts

Tom Boyd / Roger

Ronne Troup

Karen / Ginny Peterson

Vera Miles

Helen Wagner / Janet Devaney

Alexander Scourby

Lucas Coleman / Anthony Alquist

Gary Dubin

Peter / Chris Bailey

James Doohan

Fred Baxter / Detective Sgt. Brenner

Cliff Potts

Dr. Paul Moran / Paul

Berkeley Harris

Glenn Weckner

Larry J. Blake

Urologist / Capt. Merriman

Don 'Red' Barry

Al Karlovic / Abner Dickens

Julie Adams

Lee Morgan / Claire Berwick

Aneta Corsaut

Brenda Tillerman / Jenny Bailey

Maudie Prickett

Miss James / Mrs. Betts

Tracie Savage

Judy Rollins / Casey Sellers

Nehemiah Persoff

Max Behrman / Nick Kolinski

Don Stroud

Dutch Radtke / Charlie Gates

Richard Basehart

Reece Sutton / Professor Andrew Kirkcastle

Joanna Barnes

Laura Daniels / Noreen Saunders

Russell Thorson

Dr. Gregson / Dr. Sloan

Charles Seel

Mr. Webster / Mr. Doremus

Virginia Gregg

Janet Kenderdine / Dr. Martha Heider

John Daheim

Sgt. Miller / Police Sgt.

Dorothy Dells

2nd Nurse / Teacher

Lindsay Wagner

Emily Metaxas / Nurse Gledhill

Richard Derr

Winston Ackroyd / Baryatrician

Fionnula Flanagan

Maggie

Arthur Hill

Owen Marshall

Lee Majors

Jess Brandon

Ron Masak

Stan Krause

Richard Bull

Lawyer

Paul Kent

Alan Pritchard / Albert McGrath

Robert F. Simon

Dr.Byron V. Anders / Dr. Graham

Alma Platt

Mrs. Prentiss / Little Old Lady

Dee Carroll

Nora Thomason / Admitting Nurse

Kathleen Hughes

Nurse / Kathy