The pair spoke about magnetism and he was not seen again after this.
Actress Chen said she would love to see the character return, so there is hope he will be back in season five.
Speaking to Express.co.uk about who else she would love to have worked with, she said: “Honestly, I would have been happy to be able to film with anyone in the cast.
“Such extraordinary actors. But in all seriousness, can we bring Mr Clarke back though? Who’s with me?!”
Fans have taken to Reddit to discuss where Mr Clarke was in season four.
source: express.co.uk