 Portrayed by American actress Diana Muldaur , Pulaski replaced the character of Commander Beverly Crusher for the second season after Gates McFadden 's contract was not renewed . Pulaski first appeared in the second season opener " The Child " , and made her final appearance in " Shades of Gray " . Before playing the role of Pulaski on The Next Generation , Muldaur appeared in Star Trek : The Original Series , playing different characters in the episodes " Return to Tomorrow " and " Is There in Truth No Beauty ? " She later worked with series creator Gene Roddenberry on a pilot for the series Planet Earth . McFadden returned to replace Muldaur in the third season , reprising her role as Dr. Crusher for the remainder of the series . 
 Portrayed by American actress Diana Muldaur , Pulaski replaced the character of Commander Beverly Crusher for the second season after Gates McFadden <a href='null_genetive' title='1'><mark>'s</mark></a>contract was not renewed . Pulaski first appeared in the second season opener " The Child " , and made her final appearance in " Shades of Gray " . Before playing the role of Pulaski on The Next Generation , Muldaur appeared in Star Trek : The Original Series , playing different characters in the episodes " Return to Tomorrow " and " Is <a href='dey_it' title='2'><mark>There</mark></a> in Truth No Beauty ? " She later worked with series creator Gene Roddenberry on a pilot for the series Planet Earth . McFadden returned to replace Muldaur in the third season , reprising her role as Dr. Crusher for the remainder of the series . 
Portrayed by American actress Diana Muldaur , Pulaski replaced da character of Commander Beverly Crusher for the second season after Gates McFadden  contract was not renewed . Pulaski first appeared in tdasecond season opener " The Child " , and made her final appearance in " Shades of Gray " . Before playin thdaole of Pulaski on Thedaxt Generation , Muldaur appeared in Star Trek : The Original Series , playing diff characters in the episodes " Return to Tomorrow " and " Is It in Truth No Beauty ? " She later worked wid series creator Gene Roddenberry on a pilot fir the daies Planet Earth . McFadden returned to replace Muldaur in the third season , reprising her role as Dr. Crusher for the remainder of the series .