Is it permissible to help a woman who asks for financial assistance and clothes, but the questioner doubts her religious commitment due to her following TV series that portray prophets?

We do not advise stopping assistance to the sister in need, as her watching TV series or admiring actors is not a religious impediment to helping her. This kindness should be utilized to advise her and call her to goodness, for "kindness is the key to hearts," and Allah may make you a reason for her guidance.