Walter

 has several meanings pertinent to the Doctor Who universe and the real world. They are listed below in alphabetical order by surname. If no surname is available, alphabetization occurs by the disambiguation term — that is, the bit between the parentheses in a title like Waitress (Random Shoes).

As only name

 * Walter (Sick Building) (NSA: Sick Building)
 * Walter (A Town Called Mercy) (DW: A Town Called Mercy)
 * Walter (Whiskey and Water) (ST: Whiskey and Water)

As first name

 * Walter Jacobs (BFA: The Fearmonger)
 * Walter J. Matheson (PDA: Synthespians™)
 * Walter Raleigh (DW: The Mind of Evil, et al)
 * Walter Wibberley (ST: To Cut a Blade of Grass)

Guest

 * Walter Fitzgerald, who played Senex in DW: The Dominators
 * Walter Goodman, who played Joseph Chambers in DW: Robot
 * Walter Randall, who played several roles in Doctor Who

Monster specialists

 * Walter Henry, who played a Primord in DW: Inferno

Guest

 * Natalie Walter, who played Alice Coltrane in DW: Turn Left

Vocal

 * Chris Walter-Evans, who voiced the Bordinan's Assistant in BFA: Faith Stealer
 * Harriet Walter, who voiced Beatrice Mapp in BFA: The Boy That Time Forgot

Television

 * Ted Walter, who was film editor for DW: The Daleks, The Moonbase and The Evil of the Daleks

Prose

 * Walter Howarth, a Doctor Who annual illustrator

Other

 * Richard Walter, an article writer for Doctor Who Magazine