Guest Star Guide: 'General Hospital' Star Maurice Benard on 'Castle' Tonight

Jonathan Silverman, Maurice Benard and Nathan Fillion on the set of Castle.

Daytime stars and alums are primetime, on talk shows, and in made-for-TV movies.

Check out our updated Guest Star Guide below to find out where your current or former favorites may be appearing soon.

Monday, April 25
* The Talk (2 p.m. ET/1 p.m. PT on CBS) - Julian McMahon (ex-Ian Rain, Another World) discusses his new series.
* Lucifer (9 p.m. ET/PT on CBS) - Heather Tom (Katie Logan Spencer, The Bold and the Beautiful) returns as Mel Graham.
* NCIS: Los Angeles (10 p.m. ET/PT on CBS) - Josh Duhon (ex-Logan Hayes, General Hospital) plays Darren Lee.
* Castle (10 p.m. ET/PT on ABC) - Maurice Benard (Sonny Corinthos, General Hospital) plays Horatio Spate.

Tuesday, April 26
* The Talk (2 p.m. ET/1 p.m. PT on CBS) - John Stamos (ex-Blackie Parrish, General Hospital) visits.
* Fresh Off the Boat (8 p.m. ET/PT on ABC) - Ray Wise (ex-Ian Ward, The Young and the Restless) returns as Marvin.

Wednesday, April 27
* Empire (9 p.m. ET/PT on FOX) - Annie Ilonzeh (ex-Maya Ward, General Hospital) returns as Harper Scott.
* Criminal Minds: Beyond Borders (10 p.m. ET/PT on CBS) - Brooklyn Rae Sizler (Emma Drake, General Hospital) plays Megan Wolf.
* Nashville (10 p.m. ET/PT on ABC) - Eric Close (ex-Sawyer Walker, Santa Barbara) returns as Teddy Conrad.

Thursday, April 28
* Good Morning America (7 a.m. ET/PT on ABC) - Susan Sarandon (ex-Patrice Kahlman, A World Apart) reunites with Geena Davis to celebrate the 25th anniversary of Thelma & Louise.

Friday, April 29
* The Talk (2 p.m. ET/1 p.m. PT on CBS) - Susan Sarandon (ex-Sarah Fairbanks, Search for Tomorrow) reunites with Geena Davis to celebrate the 25th anniversary of Thelma & Louise.
* Grimm (9 p.m. ET/PT on NBC) - Sharon Leal (ex-Dahlia Crede, Guiding Light) returns as Zuri Ellis.

Saturday, April 30
* Seduced movie premiere (8 p.m. ET/PT on Lifetime) - Jon Prescott (ex-Mike Kasnoff, As the World Turns) stars as Gavin. Robert Mailhouse (ex-Brian Scofield, Days of our Lives) plays Jason Birch. Julie Mond (ex-Lisa Niles, General Hospital) plays Margo. Synopsis: Between her stressful accounting job and raising her teenage daughter Issie, widow and single mother Caroline (Elisabeth Rohm) hasn’t given herself another chance at romance. But when Issie stumbles upon a “Missed Connections” ad that sounds like it’s directed at her mother, Caroline reluctantly agrees to meet the mystery man, and soon finds herself in a whirlwind romance with Gavin.

Sunday, May 1
* Quantico (10 p.m. ET/PT on ABC) - Lenny Platt (ex-Nate Salinger, One Life to Live) returns as Drew Perale.

Tuesday, May 3
* NCIS (8 p.m. ET/PT on CBS) - Sandra Nelson (ex-Phyllis Summers, The Young and the Restless) plays Jessica Terde; Reiko Aylesworth (ex-Rebecca Lewis, One Life to Live) plays Anne Marshall.
* The Flash (8 p.m. ET/PT on The CW) - John Wesley Shipp (ex-Kelly Nelson, Guiding Light) returns as Henry Allen.

Wednesday, May 4
* The Middle (8 p.m. ET/PT on ABC) - Robert Pine (ex-Stephen Logan, The Bold and the Beautiful) plays Mr. Travers.
* Law & Order: Special Victims Unit (9 p.m. ET/PT on NBC) - Tom Pelphrey (ex-Jonathan Randall, Guiding Light) guest stars.
* Empire (9 p.m. ET/PT on FOX) - Vivica A. Fox (ex-Maya Reubens, Generations) returns as Candace. Annie Ilonzeh (ex-Maya Ward, General Hospital) returns as Harper Scott. Tobias Truvillion (ex-Vincent Jones, One Life to Live) plays Derek Major.
* Criminal Minds (9 p.m. ET/PT on CBS) - Frances Fisher (ex-Deborah Saxon, The Edge of Night) returns as Antonia Slade. Sheryl Lee Ralph (ex-Laura McCarthy, Search for Tomorrow) returns as Hayden Montgomery.
* Nashville (10 p.m. ET/PT on ABC) - Mario Lopez (ex-Christian Ramírez, The Bold and the Beautiful) plays himself.

Friday, May 6
* Grimm (9 p.m. ET/PT on NBC) - Sharon Leal (ex-Dahlia Crede, Guiding Light) returns as Zuri Ellis.

Sunday, May 8
* The Family (9 p.m. ET/PT on ABC) - Ruben Santiago-Hudson (ex-Billy Cooper, Another World) recurs as Chief of Police Len Bucksey.
* Quantico (10 p.m. ET/PT on ABC) - Kelly Rutherford (ex-Sam Whitmore, Generations) plays Laura Wyatt.

Tuesday, May 10
* NCIS (8 p.m. ET/PT on CBS) - Sandra Nelson (ex-Phyllis Summers, The Young and the Restless) plays Jessica Terde.

Wednesday, May 11
* Heartbeat (8 p.m. ET/PT on NBC) - Michael Nouri (ex-Steve Kaslo, Search for Tomorrow) and JoBeth Williams (ex-Carrie Wheeler, Somerset) guest star.
* Empire (9 p.m. ET/PT on FOX) - Tobias Truvillion (ex-Vincent Jones, One Life to Live) returns as Derek Major.
* Law & Order: Special Victims Unit (9 p.m. ET/PT on NBC) - Michael Gross (ex-River Baldwin, The Young and the Restless) and Adam Gregory (ex-Thomas Forrester, The Bold and the Beautiful) guest star.
* Criminal Minds: Beyond Borders (10 p.m. ET/PT on CBS) - Ambyr Childers (ex-Colby Chandler, All My Children) plays Natalie Knox.

Friday, May 13
* Hawaii Five-0 (9 p.m. ET/PT on CBS) - Christopher Sean (Paul Narita, Days of our Lives) returns as Gabriel Waincrof.
* Grimm (9 p.m. ET/PT on NBC) - Sharon Leal (ex-Dahlia Crede, Guiding Light) returns as Zuri Ellis.

Wednesday, June 29
* Royal Pains (10 p.m. ET/PT on FOX) - Sebastian Roché (ex-Jerry Jacks, General Hospital) returns as Guy Childs.