Citations:Who-athon

Noun: "a marathon of the British science-fiction series Doctor Who"

 * 2013, "TV picks of the week: A lesson in Who-story", The New Zealand Herald, 21 November 2013:
 * But the Who-athon starts early on Saturday morning, with retrospectives on each doctor and classic episodes starting on UKTV at 6.30am and running throughout the day - and on Sunday, too.
 * 2013, "TV picks of the week: A lesson in Who-story", The New Zealand Herald, 21 November 2013:
 * But the Who-athon starts early on Saturday morning, with retrospectives on each doctor and classic episodes starting on UKTV at 6.30am and running throughout the day - and on Sunday, too.

Noun: "a marathon of the band the English rock band the Who"

 * 2006, David Belcher, "The kids are still alright The angry young men of the Who and television were an explosive combination, says David Belcher", The Herald (Glasgow), 1 July 2006:
 * In celebration of the Who's London Hyde Park gig this weekend, ITV4 offers a four-and-a-half hour Who-athon on Monday evening.