30 Rock co-star Tracy Morgan will be MIA for 2-3 episodes airing in March as the actor is recuperating from a kidney transplant earlier this month. “Tracy is doing well and taking some much needed time to recover after the surgery,” a rep for the actor said, adding that Morgan will return to work on the NBC show after the holidays. Morgan, who is a diabetic, is the second principal cast member on a Thursday comedy series to take health-related break this season. In September, The Big Bang Theory co-star Kaley Cuoco was sidelined with a broken leg following a horseback accident. She ended up missing just 2 episodes of the hit CBS series.