(2 episodes, season 8) Tanner Maguire - Zach Young, age 4 (4 episodes, seasons 1−2) Valerie Mahaffey - Alma Hodge (8 episodes, season 3 and 8) Carol Mansell - Pat Ziegler (4 episodes, season 2) Alec Mapa - Vern (5 episodes, seasons 2−3) John Mariano - Oliver Weston (2 episodes, season 2) Dakin Matthews - Reverend Sykes (7 episodes, seasons 1-4, 6-8) Helena Mattsson - Irina Korsakov (3 episodes, season 6) Billy Mayo - Detective Lyons (5 episodes, seasons 4-5) James Luca McBride - Al Kaminsky (3 episodes, season 4) and Cop at Applewhite's (1 episode, season 2) Eddie McClintock - Frank Helm (3 episodes, season 2) Melinda McGraw - Annabel Foster (3 episodes, season 1) Laurie Metcalf - Carolyn Bigsby (4 episodes, season 3) Rolando Molina - Hector Sanchez (3 episodes, season 7) Tim Monsion - Dr. Cunningham (2 episodes, season 2) Felice Heather Monteith - Nurse Marcy (2 episodes, season 3) Chloë Grace Moretz - Sheri Maltby (2 episodes, season 3) Betty Murphy - Alberta Fromme (5 episodes, seasons 1-3) Harry S. Murphy - Mr. Lentz (3 episodes, seasons 1-2) N Bob Newhart - Morty Flickman (3 episodes, seasons 1−2) John Haymes Newton - Jonathan Lithgow (2 episodes, season 1) O Conor O'Farrell - Detective Copeland (3 episodes, season 1) Gail O'Grady - Anne Schilling (4 episodes, season 5) Shannon O'Hurley - Mrs. Truesdale (2 episodes, seasons 1-2) Peter Onorati - Warren Schilling (2 episodes, season 5) Lupe Ontiveros - Juanita "Mama" Solis (8 episodes, seasons 1 and 8) Ion Overman - Maria Scott (3 episodes, season 5) P Sam Page - Sam Allen (7 episodes, season 6) Dougald Park - Xiao-Mei's doctor (3 episodes, seasons 2-3) Andrea Parker - Jane Carlson (11 episodes, season 8) Adrian Pasdar - David Bradley (3 episodes, season 2) Alejandro Patino - Ralph (5 episodes, season 2) Tony Plana - Alejandro Perez (5 episodes, seasons 7-8) Q R Alyson Reed - Judge Conti (3 episodes, season 8) Matt Roth - Art Shepherd (4 episodes, season 3) Richard Roundtree - Jerry Shaw (5 episodes, season 1) Jeremy Rowley - Nurse Erik (2 episodes, season 8) John Rubinstein - Principal Hobson (7 episodes, seasons 5-8) S John Schneider - Richard Watson (4 episodes, season 7) Dougray Scott - Ian Hainsworth (18 episodes, season 3) Sayeed Shahidi - Charlie James (3 episodes, season 7) James Shanklin - Detective Morgan (2 episodes, season 2) Mitch Silpa