The "Law & Order" alum will play a psychologist who runs a grief support group
The actors won't be returning for the ABC comedy's third season as series regulars
The Emmy-nominated writer/producer will continue as showrunner on the comedy and develop new projects
"Law & Order" alum Jeremy Sisto will star in adaptation of Alistair MacLain novel
Linda Hamilton, Jeremy Sisto, Amanda Donohoe, Emilie de Ravin, Rupert Graves and Jamie Thomas King make up the cast of "Air Force One Is Down"
It's another funny, sweet comedy for ABC's already fantastic Wednesday night comedy block