Decoy (1946) is a film noir focusing on a woman's manipulative schemes involving men and stolen money. The film's plot and character development do not include any discernible LGBTQ+ characters or themes, resulting in no direct impact on LGBTQ+ representation.

The film 'Decoy' (1957) does not contain any identifiable transsexual characters or themes within its narrative. Consequently, an assessment of its portrayal of transsexual individuals or related topics is not applicable.

The show features Casey Jones, a female police officer who often found herself in dangerous situations. However, specific verifiable details of scenes depicting her defeating male opponents in direct physical combat (hand-to-hand or melee weapons) are not readily available. Therefore, no specific instances meeting the criteria can be identified.

Decoy is an original 1957 television series featuring new characters, most notably lead police officer Patricia Murphy. As there is no prior source material or established canon for these characters, no instances of a gender swap can be identified.

Decoy (1957) is an original television series, not an adaptation of pre-existing material or a biopic. Consequently, there are no characters whose race was established prior to the show's creation that could be subject to a race swap.