Petrou et al. present the discovery of PSR J1728−4608, a new “redback spider” pulsar identified in ASKAP images from the EMU and VAST survey projects. Follow-up observations with Murriyang, the ATCA, the GMRT (in INdia) and MeerKAT (in South Africa) reveal that PSR J1728−4608 is a millisecond pulsar with a spin period of 2.86 ms, in a 5.05 hr orbit with a companion star. It is eclipsed for 42% of its orbit at 888 MHz, and multi–frequency image–domain observations show that the egress duration scales with frequency, where longer duration eclipses are seen at lower frequencies. An optical counterpart is detected in archival Gaia data within 0.5 arcseconds of the radio position. A radio timing study constrains the intrinsic and orbital properties of the system, revealing orbital period variations that we attribute to changes in the gravitational quadrupole moment of the companion star. Modelling of the eclipse mechanism suggests that synchrotron absorption is the dominant cause of the eclipses observed at radio wavelengths. The discovery and characterisation of systems like PSR J1728−4608 provide valuable insights into pulsar recycling, binary evolution, the nature of companion-driven eclipses, and the interplay between compact objects and their plasma environments. The images above show ASKAP images of VAST J172812.1−460801. The image on the left from 2023-05-21 shows PSR J1728−4608 in an “on” state, with the image on the right from 2023-09-25 showing the pulsar in an “off” state.