In 2006, Myanna guest-starred in "The Impossible Planet", the first episode of a two-episode Doctor Who story. Her character, Scooti, perished in the vacuum of space; the scenes of her body floating towards a black hole were filmed in an underwater tank in Pinewood Studios, to create the effect of weightlessness.
Also in 2006,Myanna played Olivia in a production of Shakespeare's Twelfth Night by Exeter's Northcott Theatre Company, alongside Sara Weymouth and David Gwillim, and appeared in a new play, Seduced by Michael Kingsbury at London's Finborough Theatre. In 2008, Buring starred as Alice in the independent film Credo, also known as The Devil's Curse.
Myanna also starred as Debbie in Much Ado About Nothing (BBC1), Midsomer Murders (ITV), Casualty (BBC1) and Murder Prevention (Channel 5). For MahWaff Theatre Company, she starred in Guardians, Monologue For An Ensemble and An Inspector Calls.