Slate Holmgren has: Played Mover in "Everwood" in 2002. Played Ryan Belfair in "The Good Wife" in 2009. Played Rolland in "Dragon Hunter" in 2009. Played Husband in "Eve" in 2010. Played Bob in "Blue Bloods" in 2010. Played Kris Holmstra in "Return to the Hiding Place" in 2011. Performed in "Douglas Brown" in 2013.
Christer Holmgren has: Played John in "En Kopp te" in 1965. Played 490326-83 Jonsson in "Exercis" in 1968. Played Flygofficer Bredberg in "Fiendens fiende" in 1990. Played Sekreterare 1809 in "Macklean" in 1993. Played Stefan in "Lithivm" in 1998. Played Emperor Jiles in "Threads of Destiny" in 2014.
You may be referring to a clapboard (also called a clapper, clapperboard, clap slate, or slate board). See the Related Link below for the Wikipedia entry.
Christine Agresti has: Performed in "Thieves Rush In" in 2008. Played Strange Girl in "Roleplaying" in 2009. Played Jessica in "References" in 2011. Played Tina Crane in "Slate" in 2011. Played Vivian in "The Maintenance Man" in 2013.
Del Dayrit has: Played Patient in "Spooks" in 2002. Played Mercenary in "Spooks" in 2002. Played FBI Agent in "Blank Slate" in 2008. Played Pilot in "Waiting for Forever" in 2010. Played Slave buyer in "The Legend of Awesomest Maximus" in 2011.
Leah Russell has: Played Restaurant Patron in "All My Friends Are Leaving Brisbane" in 2007. Played Runner in "Blank Slate" in 2008. Played Hezlett in "Rise" in 2012. Played Angel in "Art or Love" in 2013. Played Ness in "Analysis" in 2013.
Michelle Cammarata has: Played Sandy Flowers in "The Slate: Casting by Larry Donovan" in 2011. Played Heather in "Moonsie" in 2012. Played Stephanie in "Brooklyn Breach" in 2012. Played Sarah in "Carroll Park" in 2013. Played Lucy in "Abandoned in the Dark" in 2014.
Jeannine Thompson has: Played Jade in "Spunky Airlines" in 2010. Played Fran in "Goodbye Walt" in 2012. Played Mom in "Red Blob Massacre" in 2012. Played Rayleen Carter-Jankovich in "Extended Slate" in 2012. Played Mary in "Blood Moon Reaping" in 2014.
Sigurd Emil Roldborg has: Played Knud in "Fede tider" in 1996. Played Johnny in "Mors dag" in 1996. Played Holmgren in "Taxa" in 1997. Played Kaspar in "Slangehud" in 1999. Played Victor Clemens in "Hotellet" in 2000. Played Svend Michael in "Mit liv som Bent" in 2001. Played Jens Bonde in "The Huma-Porcellone-Syndrome" in 2008.
Dann Florek plays Mr. Slate in the Flintstones movie released in 1994.
Beki Lantos has: Played Margaret Brewer in "Goosebumps" in 1995. Played Kareen Hawlings in "Goosebumps" in 1995. Played Mimi in "The Adventures of Shirley Holmes" in 1996. Played Karen in "Frankenstein and Me" in 1997. Played Young Eileen Canboro in "Tribulation" in 2000. Played Gianna in "A Clean Slate" in 2014. Played Clerk in "Spyfall" in 2014.
Clapper Board, Clap Slate, Slate
David Cloutier has: Played Fils de Jean Dostie in "Un tueur si proche" in 2004. Played Pierre Bresson in "The Slate: Casting by Larry Donovan" in 2011. Played Grand Blond in "30 Vies" in 2011. Played Marcel in "Les Roux" in 2011. Played Julien - caissier pizzeria in "19-2" in 2011.