Through the Looking Glass (Lost) series would conclude 48 episodes after "Through the Looking Glass", they felt comfortable playing flashforwards as early as the third-season finale. Post-production wrapped on May 21, 2007, only two days before it aired on television. The score was composed by series musician Michael Giacchino, while popular music was also featured throughout the episode. Charlie also sings a song in the episode that was written by Dominic Monaghan, who plays him. A "Lost" season finale is approximately twice as long the average "Lost" episode. Due to the episode's length, it was split into two parts in some countries and when released
Who Do You Think You Are? (UK TV series) És?" ("Who Do You Think You Are?") at the 10:30 pm timeslot. The first season featured such names as the comedian Herman José, the actresses Maria do Céu Guerra and Maria João Abreu, the musician Zé Pedro from the Xutos & Pontapés rock band and the fadista Camané. BBC Cymru Wales has a similar series called "Coming Home", made by Yellow Duck Productions, which features celebrities with a Welsh background. In 2007 Wall to Wall Media developed "You Don't Know You're Born" for ITV1. The series saw various celebrities taking on their ancestors' jobs. UKTV broadcast "My Famous Family" in