Betrayal (S02E10)

Terra and Beast Boy are excited to take their relationship to the next level with a date. However, during their outing, Slade's army infiltrates Titans Tower. Just as Beast Boy and Terra are about to share a kiss, Slade interrupts, revealing that Terra is his apprentice. This shocking announcement devastates Beast Boy, leaving him heartbroken. In a moment of anger and betrayal, he turns away from Terra, allowing her to leave with Slade, shattering their budding romance.