Long John Silver

 took the Sixth Doctor and companions to the Mistress's citadel in the Land of Fiction. (AUDIO: Legend of the Cybermen)

Kenneth LeBlanc compared Josh Carter to Long John Silver's parrot, always being at his shoulder. (AUDIO: Silent Majority)

In circa 2000000, Ace compared Lefty Lonnigan to Long John Silver as he was a cyborg. (AUDIO: A Life of Crime)

Behind the scenes
Tom Baker has played Long John Silver twice, once on stage and once for Big Finish Productions. The role has also been played by Brian Blessed and Peter Jeffrey.