Colette O'Neil played Tanha in the Doctor Who story Snakedance.
O'Neil has appeared in over seventy film and television shows from 1958-2015. These include roles on television shows such as Z-Cars, Coronation Street, Adam Adamant Lives!, No Hiding Place, Softly Softly: Taskforce, Armchair Theatre, Dixon of Dock Green, Crown Court and EastEnders.