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John Joseph Edward Cassidy (March 5, 1927 – December 12, 1976) was an American actor, singer and theatre director. He received multiple Tony Award nominations and a win, as well as a Grammy Award, for his work on the Broadway production of the musical She Loves Me. He also received two Primetime Emmy Award nominations. He was the father of teen idols David Cassidy and Shaun Cassidy.
| Year | Title | Role | Notes |
| 1961 | Look in Any Window | Gareth Lowell | |
| 1962 | The Chapman Report | Ted Dyson | |
| 1970 | The Cockeyed Cowboys of Calico County | Roger Hand | |
| 1971 | Bunny O'Hare | Lieutenant Greeley | |
| 1975 | The Eiger Sanction | Miles Mellough | |
| 1976 | W. C. Fields and Me | John Barrymore | |
| 1977 | The Private Files of J. Edgar Hoover | Damon Runyon | Posthumous release |
| Year | Title | Role | Notes |
| 1957 | The United States Steel Hour | Performer | Season 4 Episode 13: "Shadow of Evil" |
| 1957 | Lux Video Theatre | Dr. Frederick Steele | Season 7 Episode 21: "Dark Victory" |
| 1957 | Lux Video Theatre | Denis | Season 7 Episode 49: "Last Act" |
| 1958 | Richard Diamond, Private Detective | Danny Fortune | Season 2 Episode 17: "The Percentage Takers" |
| 1958 | Gunsmoke | Marcus France | Season 3 Episode 39: "The Gentleman" |
| 1960 | The Chevy Mystery Show | David Townsend | Season 1 Episode 14: "Femme Fatale" |
| 1961 | Hawaiian Eye | Maurice Clifford | Season 3 Episode 14: "Concert in Hawaii" |
| 1961 | Maverick | Roger Cushman | Season 5 Episode 2: "The Art Lovers" |
| 1961 | Alfred Hitchcock Presents | Mark Lansing | Season 6 Episode 29: "The Pearl Necklace" |
| 1961 | General Electric Theater | Alan Richards | Season 9 Episode 28: "Sis Bowls 'Em Over" |
| 1961 | Lock-Up | Vincent Gibson | Season 2 Episode 28: "Two Wrongs" |
| 1961 | Wagon Train | Dan Palmer | Season 4 Episode 24: "The Nancy Palmer Story" |
| 1962 | Surfside 6 | Val Morton | Season 2 Episode 21: "Who is Sylvia?" |
| 1962 | The Everglades | Ron Fairburn | Season 1 Episode 18: "Black Honeymoon" |
| 1962 | FBI Code 98 | Walter Macklin | Television Movie |
| 1962 | 77 Sunset Strip | Dick Arnador | Season 4 Episode 20: "The Bridal Trail Caper" |
| 1961 | Bronco | Edward Miller | Season 4 Episode 5: "The Harrigan" |
| 1962 | Bronco | Marshal Bill Hickok | Season 4 Episode 13: "One Evening in Abilene" |
| 1962 | The Dick Powell Show | Roth | Season 2 Episode 13: "The Big Day" |
| 1962 | Mister Magoo's Christmas Carol | Bob Cratchit (voice) | Television Movie |
| 1962 | Hennesey | Chaplain | Season 3 Episode 32: "I Thee Wed" |
| 1963 | The Wide Country | Jerry Manning | Season 1 Episode 21: "The Judas Ghost" |
| 1964 | Mr. Broadway | Allan | Season 1 Episode 6: "The He-She Chemistry" |
| 1964 | Famous Adventures of Mr. Magoo | voice | Television Movie |
| 1965 | The Lucy Show | Professor Zoorkin | Season 4 Episode 10: "Lucy and the Undercover Agent" |
| 1965 | The Alfred Hitchcock Hour | Arthur Mannix | Season 3 Episode 21: "The Photographer and the Undertaker" |
| 1967 | Coronet Blue | Spangler | Season 1 Episode 7: "A Charade for Murder" |
| 1967 | The Girl from U.N.C.L.E. | Rock Mussin | Season 1 Episode 21: "The Carpathian Caper Affair" |
| 1967 | I Spy | Nick Fleming | Season 2 Episode 19: "The Trouble with Temple" |
| 1967–68 | He & She | Oscar North | 26 episodes |
| 1968 | Mouse on the Mayflower | John Alden, voice | Rankin-Bass animated holiday TV special |
| 1968 | Get Smart | Mr. Bob | Season 4 Episode 8: "The Return of the Ancient Mariner" |
| 1968 | Bewitched | Rance Butler | Season 5 Episode 2: "Samantha Goes South for a Spell" |
| 1969 | That Girl | Marty Haines | Season 4 Episode 12: "She Never Had the Vegas Notion" |
| 1969 | That Girl | Marty Haines | Season 4 Episode 13: "She Never Had the Vegas Notion Part Two" |
| 1970 | Bewitched | George Dinsdale | Season 6 Episode 26: "A Chance on Love" |
| 1970 | The Governor & J.J. | Mark Ellison | Season 2 Episode 9: "The Making of the Governor" |
| 1970 | Matt Lincoln | Doug Conway | Season 1 Episode 3: "Nina" |
| 1970 | George M! | Jeremiah "Jerry" Cohan | Television Movie |
| 1970 | The Andersonville Trial | Otis Baker | Television Movie |
| 1970 | Love, American Style | Chuck Fuller | Season 1 Episode 20 (segment: "Love and the Many Married Couple") |
| 1971 | Love, American Style | Fred | Season 2 Episode 18 (segment: "Love and the Big Game") |
| 1971 | Sarge | John Michael O'Flaherty | Season 1 Episode 6: "The Eleven O'Clock War" |
| 1971 | Bonanza | Kevin O'Casey | Season 13 Episode 6: "Cassie" |
| 1971 | The Mary Tyler Moore Show | Hal Baxter | Season 2 Episode 6: "Cover Boy" |
| 1971 | Alias Smith and Jones | Harry Wagener | Season 2 Episode 2: "How to Rob a Bank in One Hard Lesson" |
| 1971 | Columbo | Ken Franklin | Season 1 Episode 1: "Murder by the Book" |
| 1971 | The Powder Room | Performer | Television Movie |
| 1971 | Night Gallery | Marius Davis | Season 1 Episode 6 (segment: "The Last Laurel") |
| Year | Title | Role | Venue |
| 1943 | Something for the Boys | chorus | Alvin Theatre |
| 1944 | Sadie Thompson | chorus | |
| 1946 | Around the World | chorus | Adelphi Theatre |
| 1947 | Music in My Heart | chorus | |
| 1948 | Small Wonder | ensemble | Coronet Theatre |
| 1948 | Inside U.S.A. | chorus | Majestic Theatre |
| 1949 | Theater '49 | ensemble | General Artists Corporation NYC |
| 1952 | South Pacific | Richard West | Majestic Theatre |
| 1952 | Wish You Were Here | Chick Miller | Imperial Theatre |
| 1954 | Sandhog | Johnny O'Sullivan | Phoenix Theatre |
| 1956 | Shangri-La | Charles Mallinson | Winter Garden Theatre |
| 1957 | The Beggar's Opera | MacHeath | New York City Center |
| 1963 | She Loves Me | Steven Kodaly | Eugene O'Neill Theatre |
| 1964 | Fade Out – Fade In | Byron Prong | Mark Hellinger Theatre |
| 1966 | It's a Bird...It's a Plane...It's Superman | Max Mencken | Alvin Theatre |
| 1968 | Maggie Flynn | Phineas Flynn | ANTA Theatre |
| 1969 | The Mundy Scheme | Mick Moloney | Royale Theatre |
| 1973 | Sondheim: A Musical Tribute | Performer | Concert, Shubert Theater |
| 1975 | Murder Among Friends | Palmer Forrester | Biltmore Theatre |
| Year | Title | Role | Venue |
| 1956 | Oklahoma! | Curly | European tour |
| 1958 | Wonderful Town | Robert Baker | Brussels World's Fair, Belgium |
| London, United Kingdom | |||
| 1959 | Wish You Were Here | Chick Miller | Dallas, Texas |
| 1959 | Epitaph for George Dillon | George Dillon | Los Angeles, California |
| 1962 | Gypsy | Herbie | Dallas, Texas |
| 1965 | Mary, Mary | Dirk Winsten | National tour |
| 1965 | Camelot | Lancelot | National tour |
| 1967 | Wait Until Dark | Roat | National tour |
| 1972 | The Marriage Band | Performer | Las Vegas, Nevada; National tour |
| Year | Award | Category | Nominated work | Result | Ref. |
| 1964 | Grammy Awards | Best Score From an Original Cast Show Album | She Loves Me | Won | |
| 1964 | Tony Awards | Best Supporting or Featured Actor in a Musical | Won | ||
| 1965 | Fade Out - Fade In | Nominated | |||
| 1966 | Best Leading Actor in Musical | It's a Bird, It's a Plane, It's Superman | Nominated | ||
| 1969 | Maggie Flynn | Nominated | |||
| 1968 | Primetime Emmy Awards | Outstanding Performance by an Actor in a Supporting Role in a Comedy | He & She | Nominated | |
| 1971 | Outstanding Single Performance by an Actor in a Leading Role | The Andersonville Trial | Nominated |