Fringe's John Noble Returns to Work After Sleep Disorder Treatment: 'I Basically Hit a Wall'

John Noble has returned to work on the fifth and final season of Fringe after taking a brief hiatus late last month to seek treatment for a sleep disorder.

“I basically hit a wall, and we had to deal with it,” the actor tells EW.com of his recent setback, which stemmed from an exacerbated combination of insomnia and sleep apnea — both of which he’s endured less seriously for years.

“I went to the hospital, had all the tests, and we put the strategies into place to deal with both of those issues — including the space-age mask that I wear to bed now,” he continued with a laugh. “It’s pretty unsightly.”

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Noble — who is back in Vancouver shooting the second episode of the upcoming run — assured that he is “feeling more well rested” than ever before and is beyond grateful for the outpouring of love that followed his ordeal. “People were so bloody supportive,” he noted. “It was really touching.”

Fringe‘s final season premieres Friday, Sept. 28 at 9/8c.