Christy and Bonnie Are Unwelcome Guests on Mom Episode 21

1. "Patient Zero and the Chocolate Fountain"

Christy (Anna Faris, right) and Bonnie (Allison Janney, left) discuss Bonnie's court case, on MOM Thursday, April 23 (9:30 -- 10:00 PM ET, PT) on the CBS Television Network. Photo: Sonja Flemming/CBS ©2015 CBS Broadcasting, Inc. All Rights Reserved

2. Keeping it real

Bonnie (Allison Janney, right) and Christy (Anna Faris, left) fight over what transpired in court, on MOM Thursday, April 23 (9:30 -- 10:00 PM ET, PT) on the CBS Television Network. Photo: Sonja Flemming/CBS ©2015 CBS Broadcasting, Inc. All Rights Reserved

3. Listen up

Regina (Octavia Spencer, left) and Jill (Jaime Pressly, right) listen to Bonnie during an AA meeting, on MOM Thursday, April 23 (9:30 -- 10:00 PM ET, PT) on the CBS Television Network. Photo: Sonja Flemming/CBS ©2015 CBS Broadcasting, Inc. All Rights Reserved

4. Sharing is caring

Christy (Anna Faris, left) listens to Bonnie (Allison Janney, right) share during the AA meeting, on MOM Thursday, April 23 (9:30 -- 10:00 PM ET, PT) on the CBS Television Network. Photo: Sonja Flemming/CBS ©2015 CBS Broadcasting, Inc. All Rights Reserved

5. Bonnie's helping out

Bonnie (Allison Janney) gets ready for community service, on MOM Thursday, April 23 (9:30 -- 10:00 PM ET, PT) on the CBS Television Network. Photo: Sonja Flemming/CBS ©2015 CBS Broadcasting, Inc. All Rights Reserved

6. Just a mother-daughter argument

Bonnie (Allison Janney, right) argues with Christy (Anna Faris, left), on MOM Thursday, April 23 (9:30 -- 10:00 PM ET, PT) on the CBS Television Network. Photo: Sonja Flemming/CBS ©2015 CBS Broadcasting, Inc. All Rights Reserved

7. Dinner talk

Bonnie (Allison Janney, left), Christy (Anna Faris, center) and Roscoe (Blake Garrett Rosenthal, right) have dinner, on MOM Thursday, April 23 (9:30 -- 10:00 PM ET, PT) on the CBS Television Network. Photo: Sonja Flemming/CBS ©2015 CBS Broadcasting, Inc. All Rights Reserved