Doctor Who: New Flatline Preview Clip By TGT | 15th October 2014 Today the BBC released a new preview clip for this Saturday’s episode of Doctor Who, Flatline. Flatline airs this Saturday at 8:25pm on BBC One. Share this:Click to share on Facebook (Opens in new window)Click to share on Twitter (Opens in new window)Click to share on WhatsApp (Opens in new window)Click to share on LinkedIn (Opens in new window)Click to share on Reddit (Opens in new window) Related Posted in News and tagged Flatline