Doctor Who: The Story Behind K9

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The long history of everyone's favorite never-ending English sci-fi story features some of the most beloved stories alongside plenty of questionable decisions. Doctor Who is coming up on its sixtieth anniversary, and no show can live that long with every piece of lore intact.

A lot of Doctor Who fans didn't get into the series until the early-2000s reboot series. The fanbase was radically changed when David Tennant brought his unique charm to the role, and not every fan went back to check out the series' decades of background. There are endless worlds of weird decisions hiding in those 60s and 70s episodes of the beloved series.

Doctor Who: The Story Behind The Iconic Theme Song

Anyone with a passing familiarity with the Doctor Who format understands that the mysterious Time Lord always travels with one or two regular people. His companions vary wildly in all metrics. Some are beloved staples of the franchise while others are forgotten as quickly as they're introduced. The fourth Doctor, still the longest-lived iteration of the character garnered quite a list of companions over his seven seasons. Portrayed by Tom Baker, Doctor #4 was best remembered for his distinctive colorful scarf and his obsession with candy. Baker is regarded as one of the most recognizable and most beloved incarnations of the character even today, forty years after his tenure on the series ended. On Baker's long journey, he picked up a hard-nosed journalist, a powerful alien warrior, a precocious teenage genius, a fellow member of his own species, and, of course, a robot dog named K9.

There have been no less than four iterations of robot dogs operating under the name K9. The first was introduced in the 1977 serial The Invisible Enemy. The original