Topzle Updated: Wikipedia source
William Patrick Muldoon III (September 27, 1968 – April 19, 2026) was an American actor, film producer, and musician. He was best known for his roles as Austin Reed on Days of Our Lives and Zander Barcalow on Starship Troopers.
| Year | Title | Role | Notes |
| 1993 | Rage and Honor II | Tommy Andrews | |
| 1997 | Starship Troopers | Zander Barcalow | |
| 1998 | Arrival II | Jack Addison | Direct-to-video |
| Wicked | Lawson Smith | ||
| 1999 | Stigmata | Steven | |
| Red Team | Jason Chandler | ||
| 2001 | Bad Karma | Trey Campbell | |
| Blackwoods | Matt Sullivan | ||
| 2002 | Whacked! | Mark Steward | |
| Heart of America | Ryan Kirkland | ||
| 2006 | Miracle Dogs Too | Jeff | Direct-to-video |
| Military Intelligence and You! | Nick Reed | ||
| 2008 | Christmas Town | Kevin | Direct-to-video |
| Broken Angel | |||
| Japan | Taxi Driver | ||
| 2009 | Noah's Ark: The New Beginning | Shem | Voice; direct-to-video |
| The Chaos Experiment | Christopher | ||
| 2010 | Repo | Jeffery Maiser | |
| The 7 Adventures of Sinbad | Sinbad | Direct-to-video | |
| 2011 | Last Will | Joseph Emery | |
| Born to Ride | |||
| 2013 | Spiders 3D | Jason Cole | |
| 2014 | The Dog Who Saved Easter | Fred Stein | Direct-to-video |
| 2015 | The Dog Who Saved Summer | ||
| A Horse Tale | Michael | ||
| Robo-Dog | Tom Austin | ||
| 2016 | Little Dead Rotting Hood | Henry | |
| 2017 | American Satan | SS Singer | |
| Saving Christmas | Sammy | Direct-to-video | |
| The Tribes of Palos Verdes | —.mw- N/a | Executive producer | |
| 2018 | A Dog & Pony Show | Rusty Wiggins | |
| Runnin' from My Roots | Seth Ingram | ||
| Bernie the Dolphin | Bob Ryan | ||
| 2019 | My Adventures with Santa | Josh Nolan | |
| Bernie the Dolphin 2 | Bob Ryan | ||
| 2020 | Arkansas | Joe | Also executive producer |
| The Comeback Trail | Frank Pierce | ||
| Timecrafters: The Treasure of Pirate's Cove | Mr. Dare | ||
| 2021 | Vanquish | Agent Monroe | |
| Deadlock | Mack Karr | ||
| The Card Counter | —N/a | Executive producer | |
| 2022 | Marlowe | Richard Cavendish | Also executive producer |
| 2023 | The Quest for Tom Sawyer's Gold | AJ Harrison | |
| 2024 | Murder at Hollow Creek | Thomas Bennett | |
| Riff Raff | —N/a | Executive producer | |
| 2026 | The Dreadful | —N/a | |
| Dirty Hands | Richie Denton | Posthumous release | |
| TBA | Stay at Home | David | Post-production, posthumous release |
| Pray for Me: Key to Freedom | Senator |
| Year | Title | Role | Notes |
| 1990 | Who's the Boss? | Matt | 2 episodes |
| 1991 | Saved by the Bell | Jeffrey Hunter | 3 episodes |
| 1992 | Silk Stalkings | Charles Lantman | Episode: "Good Time Charlie" |
| 1992–1995, 2011–2012 | Days of Our Lives | Austin Reed | Returned to role in September 2011 after a 16-year hiatus |
| 1993 | Night Sins | Television film | |
| 1994 | Winter Heat | ||
| 1995–1996 | Melrose Place | Richard Hart | Recurring role |
| 1996 | Deadly Pursuits | Tim Faulkner | Television film |
| 1998 | Black Cat Run | Johnny Del Grissom | |
| 2000 | Final Ascent | Viggo | |
| Chain of Command | Michael Connelly | ||
| 2002 | Project Viper | Mike Connors | |
| 2004 | A Boyfriend for Christmas | Ryan Hughes | |
| 2007 | Point of Entry | Caleb Theroux | |
| Ice Spiders | "Dash" Dashiell | ||
| 2010 | Turbulent Skies | Charles Devain | |
| 2012 | All About Christmas Eve | Tino Accosta | |
| 2013 | Holiday Road Trip | Patrick | |
| The Haunting of... | Himself | Documentary series; episode: "Patrick Muldoon" | |
| 2014 | Christmas in Palm Springs | Joe Brady | Television film |
| Fatal Acquittal | Scott | ||
| Deadly Revenge | Jack | ||
| Finders Keepers | Jonathan Simon | ||
| 2015 | Patient Killer | Derek | |
| A Christmas Reunion | Jack | ||
| 2016 | His Secret Past | Charles | |
| 2017 | Boyfriend Killer | Charles Durro | |
| 2018 | A Tale of Two Coreys | Bob Feldman | |
| 2025 | Double Scoop | Everett |
| Year | Artist | Song | Role |
| 2013 | Daughtry | "Waiting for Superman" | Suicidal Man |