The actor, who plays Chief Jim Hopper in the hit Netflix series, confessed: "Here’s the interesting thing – something I’ve never truly spoken about publicly. I was actually into this Catholicism thing… and I was sober for like a year and a half. I was 25, and I actually did have a manic episode. I was diagnosed as bipolar.”
Harbour revealed that his parents then ending up bringing him to a “mental asylum”.
During an interview with Marc Maron’s WTF podcast, he added: “I have one thing to say about the mental asylum. One is being in a mental asylum (is) really not as fun as you think it is. No, but you do have a romantic idea of it – [like] you’re a genius – and it just ends up being sad and smells like shit.
"And the other thing was boating. I just recently went out on a ship in open water and I’d read Moby Dick a million times, and it really is not as sexy. It’s very similar to the mental asylum experience.”
Harbour also talked about how he has been taking medication now for a "long time" to deal with biploar.