Age 49, for what it's worth.
M.A.S.H
The Wire
Life on Mars
Survivors (the original)
Band of Brothers
Honourable mentions to :- Spooks, The Professionals, Ashes to Ashes, Life on Earth, Blackadder, Downton Abbey, Luther, Agatha Christie's Poirot, The Young Ones, Monty Python's Flying Circus, The Fast Show, The Killing, The Bridge, Boys From the Blackstuff, Tinker-Tailor-Soldier-Spy, Prime Suspect, The Odd Couple, Taxi, and Twin Peaks.
I'm amazed so many here have put Lost, 24, Prison Break, Heros etc up there to be honest, but hey ho.