<qa>  What is the end of the double-blind phase?We hypothesize that testosterone replacement will improve mood and quality of life in older men with low testosterone and mild depression. Study subjects will receive either testosterone gel or a placebo inactive gel for 12 weeks. Neither the subject or the investigator will know whether they are receiving placebo or testosterone gel. At the end of the initial 12 week period, all subjects will receive testosterone gel for 12 more weeks. Mood and quality of life measures will be obtained at baseline, at the end of the double-blind phase and at the end of the extension phase when all subjects receive testosterone. 