The Flash star Tom Cavanagh opens up about Wells leaving the series: 'It was definitely my decision' ... But with the show heading into a new era, Cavanagh says he decided it was time to part ways, making clear to Entertainment Weekly it was “definitely [his] decision” to leave the show.

Why is everyone leaving The Flash?

One of the reasons for this is the renegotiated contracts, and studios not negotiating new deals for actors to return in order to keep costs low also explains why some people don't return to shows when their original contracts end.

Why does Grant Gustin want to leave Flash?

He allegedly expressed his dissatisfaction with CW over several disagreements behind the scenes, explaining how he lost many other opportunities because of conflicting schedules and has several failed projects because of The Flash.