Hollywood thrives on second acts, tales of fallen stars clawing their way back to the limelight. But few stories shimmer with such complex gratitude and forgiveness as the unlikely bond between Mel Gibson and Robert Downey Jr. In the depths of Downey Jr.’s addiction, when studios wouldn’t touch him with a ten-foot pole, Gibson extended a hand, not just a contract. He offered a lifeline, a roof, and, crucially, unwavering belief.