<Tr> <Td_colspan="2"> List of Medium episodes </Td> </Tr> <P> The seventh and final season of Medium, an American television series, began broadcasting September 24, 2010 on CBS . The seventh and final season ended on January 21, 2011 . The season premiered to only 6.10 million viewers while the season and series finale got 7.87 million viewers the highest in over a year since 6.12 on January 15, 2010 . </P> <P> Season 7 was the seventh and final season of Medium . CBS renewed the show in May 2010, but they put the show in the 8: 00pm Friday Night slot replacing Ghost Whisperer . The ratings began to fall so by mid-autumn, CBS had cut the episodes from a full 22 down to 13 . Ariel goes off to Dartmouth College this season and we see little of her, but more of Bridgette and Marie . Bridgette has more bigger roles this season, as compared to the last six seasons . Allison and Joe's relationship begins to dwindle a bit this season as we learn the two aren't seeing eye to eye on everything from work to the girls, to waking up to a "different" Allison every day . In Season Four's Burn Baby Burn Parts 1 and 2, Allison tells Marjorie (Joe's mother) that she will be fine, but the little white lie proved not true . Marjorie passes away from a brain tumor / cancer in Blood on the Tracks and she warns Allison about the darkness ahead of them . Lee Scanlon deals with his deceased brother for a few episodes and admits to Allison that he has let the woman kill him a few seasons back . Devalos decides to run for the Mayor and Allison and Joe both plan to enroll in school which has caused tension between them . Laura San Giacomo who played in the show Just Shoot Me guest stars as a neighbor in the episode The People in Your Neighborhood . Allison's half brother Michael comes back after a three - season hiatus, this time played by Patricia's real life brother David Arquette . </P> <P> The series ends on a bittersweet note . Joe is killed in a plane crash on his way back from Hawaii, and we see how seven years later, Allison has become the assistant DA, Devalos has become the Mayor, Marie as a 14 - year - old, while Bridgette is in college and not present in the episode . We also see a pregnant and married Ariel . While Allison is working on a trial, she seems to have visions of Joe actually surviving the crash but with amnesia . Allison makes a decision to find out where Joe is which sacrifices her own career and their lives in US . However, she ends up finding a startling truth! The series ends in 2052, which would be 41 years later as Allison is listening to her great grand child on a recording and she meets Joe as they both look like in the present . They share a passionate kiss which shows their love lasts forever . </P>

Why did they kill off joe on medium