A four-part conspiracy thriller for BBC One, Hidden revolves around the efforts of Harry Venn (Philip Glenister), a small-time solicitor, to delve into his murky past.

Thekla plays Gina, a lawyer who visits Harry seeking help in finding a crucial, but missing, alibi witness for her client. Gina's motives are mysterious and unclear as she re-introduces Harry to aspects of a criminal past he would rather forget.

Hidden was broadcast on BBC1 in October 2011.