more than 100 episodes of ` ` Doctor Who , '' who were on Monday enthusing on Twitter are discovered . Footage shown at BBC late 1950s Christmas event . Broadcasters recorded TV programs in late 1950s , but videotape was usually wiped .
Two episodes of `` Doctor Who '' believed to have been erased in 1960s are discovered . Footage shown at British Film Institute 's annual `` Missing Believed Wiped '' event . Broadcasters recorded TV programs in late 1950s , but videotape was usually wiped .