Having himself been subjected to certain experiments in Vietnam which later proved to have involved talava, Indigo was understandibly interested in anything he could learn on the subject. When we'd run out of options with Replay the first time, he'd gambled that he understood why he'd survived his tour of SE Asia, and that he could successfully recreate the combination of drugs used on him then. While we're still not certain he was 100% correct with his pharmacology, he'd been close enough for her to pull through. Buckaroo had only discovered what he was up to when it was too late to stop him, which had turned out to be for the best. -- Reno