Bryan Cranston is mourning the death of his 'Breaking Bad' co-star RJ Mitte, who played his on-screen son Walter White Jr. for all five seasons of the hit series. In a heartbreaking tribute, Cranston recalled meeting Mitte when he was just 14 and watching him grow into a talented actor and passionate advocate for performers with disabilities. The pair had been texting just weeks ago and were trying to arrange lunch. 'I do know that I loved him,' Cranston wrote. He ended his tribute with a message to his former co-star: 'I'll miss you, son.' 📸 Getty #bryancranston #rjmitte #celebrity #breakingbad #news