The Slitheen Excursion

{{Short description|2009 novel by Simon Guerrier}}

{{Use dmy dates|date=April 2022}}

{{notability|book|date=September 2024}}

{{Infobox book

|name = The Slitheen Excursion

|image = Slitheen Exursion.jpg

|caption =

|author = Simon Guerrier

|series = Doctor Who book:
New Series Adventures

|release_number = 32

|subject = Featuring:
Tenth Doctor

|set_in = Period between
"Journey's End" and "The End of Time"

|release_date = 2 April 2009

|publisher = BBC Books

|media_type = Hardcover

|pages = 256

| isbn = 978-184607640-4

|preceded_by = Judgement of the Judoon

|followed_by = Prisoner of the Daleks

}}

The Slitheen Excursion is a BBC Books original novel written by Simon Guerrier and based on the long-running British science fiction television series Doctor Who.{{cite news|last1=Wolverson|first1=E.G.|title=The Slitheen Excursion|url=http://www.doctorwhoreviews.co.uk/TDA28.htm|accessdate=6 August 2014|publisher=Doctor Who Reviews|date=April 2009}} It features the Tenth Doctor initially without a companion, most likely following on from the fourth series finale Journey's End. During the story he does acquire a temporary companion in the form of university student June who—while still with him at the end of the story—does not appear in any other adventure. It was released on 2 April 2009, alongside Judgement of the Judoon and Prisoner of the Daleks.