ABC has announced a Thanksgiving-themed episode of The Middle will air Wednesday, November 23rd. Marsha Mason and Jerry Van Dyke reprise their roles as Frankie's parents, Pat and Tag. Molly Shannon (Saturday Night Live) guest stars as Frankie's previously unseen, but often mentioned, sister Janet.

"Thanksgiving III" - Frankie's parents, Pat (Marsha Mason) and Tag (Jerry Van Dyke), invite the Hecks to spend a few days at their house to celebrate Thanksgiving together. But the festivities begin to fall apart quickly when Frankie's sister, Janet (Molly Shannon), and her family also join in, and soon the siblings are at each other's throats over their widely differing parenting techniques. Meanwhile, Mike tries to offer some advice to Axl on how to pick up girls when he witnesses his son trying to impress a pretty mini-mart cashier - and fails miserably; Brick attempts to prove his innocence when he is accused by Janet of damaging her daughter's expensive toy; and Sue is stoked when Frankie, Pat and Janet invite her to take part in their gossip sessions, on "The Middle," WEDNESDAY, NOVEMBER 23 (8:00-8:30 p.m., ET) on the ABC Television Network.

You can read more about the in our Episode Guide.