Shelley in a promo pic for Cutter to Houston, 1983
In the 1980s, after her stint on Charlie's Angels, Shelley was determined to prove that she could act. She accepted theater roles to hone her acting chops and was able to gain positive reviews for her efforts. She then accepted supporting roles opposite respected and highly regarded actors such as Robert De Niro and Dick Van Dyke to further hone her craft and was a success as well. So much so that in 1983, she landed another lead in a medical TV series called Cutter to Houston. Her efforts have paid off.
a writeup about Shelley from the 1980s