New doctor Baran El-Hashimi (Sepideh Moafi), set to cover for Dr. Robby during his absence, immediately butted heads with him while hawking her AI initiative. Dr. Robby sent Dr. Collins home prior to the mass shooting event that dominated the second half of the season. Noah Wyle and Tracy Ifeachor in “The Pitt” Season 1. Pitt super fans were distraught since Dr. Collins had become a vital part of the series. Dr. Collins does leave a spectre over the ER, though.