United Kingdom, Dec. 18 -- Jamie Campbell Bower worked almost 24 hours at a time during Stranger Things season 4.

The 37-year-old actor joined the Netflix sci-fi hit in the fourth season, and makeup effects lead Barrie Gower has opened up about the gruelling process he underwent.

He told PEOPLE magazine: "We could be starting at 1am, 2am to get him ready for 8am or 9am. We would have a whole shooting day of, maybe a 10 to 12 hours. Then we would be de-rigging him two hours in the evening.

"By the time they got to the fourth season, the production team was so experienced and so on it.

"Tudor Jones - who's one of the producers on season 5, but he was the first assistant director on season 4 - he scheduled the shoots so cleverly and cons...