(CNN) -- After dealing with porcupine creatures, shape-shifters and planes full of crystallized bodies over five seasons, star John Noble is still having the time of his life on "Fringe." The cult favorite sci-fi series is in the midst of its final season on Fox, and classic episodes premiere Tuesday night on the Science Channel. Noble, who plays the brilliant (and occasionally mad) scientist Walter Bishop, recently spoke with CNN about his experience with the show and what fans can look forward to in the remaining episodes, leading up to a January 18 series finale. CNN: Are you nearing the end of filming now?
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John Noble's cult show "Fringe" is nearing the end of its run
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Noble addressed his sleep disorder treatment, which briefly halted production
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He's not as much of a junk food fan as his character; he recently discovered Twitter
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Noble shared his prediction for the final episode: "A masterpiece"
CNN: @placeholder is famous for his love of junk food.