It's a little crazy to think that it's been nine years since Smallville aired its final episode. After ten seasons and a total of 217 episodes, The CW's Tom Welling-fronted tale of young Clark Kent finally drew to a close in 2011.
To this day, Smallville has a huge and passionate fan base, with many still holding out hope that we'll one day since Welling properly suit up as the Man of Steel at some point. Following the appearance of Welling's Clark and Erica Durance's Lois Lane in the Arrowverse's stunning Crisis on Infinite Earths crossover event, it sadly looks as if those hopes of seeing Welling donning the iconic Superman suit have been well and truly dashed.
Smallville was never just about Clark Kent, of course, and there were so many supporting players who helped to make the show must-see for so many. And not just the series regulars, but Smallville famously had many a memorable character who only turned up for one single episode.
From a quick glance at IMDb, there were approximately 70 guests stars who made one-off appearances in Smallville. And while some of those appearances were instantly forgettable, there are those other guest spots who are still remembered to this very day.
With that in mind then, here are ten of the best Smallville characters who only made one appearance in the show.
10. Rudy Jones
Brendan Fletcher is an actor most likely best known for Freddy vs. Jason or more recently as one of Oliver Queen's prison buddies-turned-enemies in Arrow. Always capable of making the very best of whichever roles he's afforded, Fletcher likewise had a standout turn in Smallville.
Said turn came during the Season 8 episode, 'Injustice'. There, Fletcher played Rudy Jones, a member of Tess Mercer's team of rogues who was Smallville's take on DC Comics' Parasite villain.
Living up to his moniker, Rudy was able to extract powers and abilities from other metahumans and any aliens who happen to be in his vicinity - with 'Injustice' showing him absorbing the powers of both Livewire and Clark Kent.
Of course, Parasite's gifts came at a cost, and he'd also absorb the weaknesses of anyone whose abilities he'd nabbed. That would ultimately lead to his demise, with the Green Arrow using a kryptonite ring on Rudy after he'd engulfed the powers of Clark towards the end of 'Injustice'. It was then that he'd give Clark's powers back to him, before Parasite and fellow rogue Plastique were hauled off for a spell behind bars.