Er spielte [[Captain]] [[Lawrence H. Styles]] in {{Film|3}}.

Neben ''[[Star Trek]]'' hatte Sikking Rollen im Filmen wie ''Die Unersättlichen'' (1964, u.a. mit [[Paul Baxley]], [[Peter Duryea]], [[Ed McCready]] und [[William Meader]]), ''Derek Flint – hart wie Feuerstein'' (1967, u.a. mit [[Steve Ihnat]] und [[Yvonne Craig]]), ''Point Blank - Keiner darf Überleben'' (1967, u.a. mit [[Michael Strong]], [[Sharon Acker]], [[Sid Haig]], [[Michael Bell]], [[Jerry Catron]], [[Chuck Hicks]], [[Joseph Mell]] und [[Felix Silla]]), ''Der Mann mit dem Katzenkäfig'' (1969, u.a. mit [[Gene Lyons]]), ''Flucht vom Planet der Affen'' (1971, u.a. mit [[Ricardo Montalban]], [[William Windom]], [[Jason Evers]], [[Karl Bruck]], [[Walker Edmiston]] und [[Janos Prohaska]]), ''Man on a String'' (TV 1972, u.a. mit [[William Schallert]], [[Joel Grey]], [[Barry Russo]], [[Lincoln Demyan]], [[Carolyn Nelson]], [[Garry Walberg]] und [[Byron Morrow]]), ''Scorpio, der Killer'' (1973, u.a. mit [[John Colicos]], [[Joanne Linville]], [[William Smithers]], [[Celeste Yarnall]] und [[Morgan Farley]]), ''Im letzten Moment'' (TV 1973, u.a. mit [[Leonard Nimoy]], [[Victor Tayback]], [[Kenneth Tobey]], [[Paul Kent]], [[Paul Sorensen]] und [[Tom Troupe]]), ''The F.B.I. Story: The FBI Versus Alvin Karpis, Public Enemy Number One'' (TV 1974, u.a. mit [[Robert Foxworth]], [[Gary Lockwood]], [[Harris Yulin]], [[Whit Bissell]], [[Lenore Kasdorf]], [[Arch Whiting]], [[Bill Zuckert]] und [[Dallas Mitchell]]), ''First Steps'' (TV 1985, u.a. mit [[Kim Darby]], [[Alan Ruck]], [[Dawn Arnemann]], [[Molly Hagan]], [[William O. Campbell]], [[Peggy Roeder]] und [[Bill Blair]]) , ''Soulman'' (1986, u.a. mit [[Wallace Langham]], [[Donald Hotton]], [[Paul F. O'Brien]] und [[Scott L. Treger]], Stunts u.a. [[David Burton]], [[Steve M. Davison]], [[Chris Howell]] und [[Pat Romano]]), ''Los Angeles Police: Mord auf dem Freeway'' (TV 1987, u.a. mit [[Robert Knepper]], [[Marc Alaimo]], [[Javier Grajeda]], [[Kamala Lopez-Dawson]] und [[John Bellah]]) und ''Der Schein trügt'' (1992, u.a. mit [[Bibi Besch]], [[Jayne Brook]], [[Mark Chaet]], [[Parker Whitman]] und Stunts u.a. [[Ben Jensen]]).

In der TV-Serie ''Polizeirevier Hill Street'' (1981-1987, u.a. mit [[Barbara Bosson]], [[Megan Gallagher]], [[Barbara Babcock]], [[Daniel Zacapa]], [[Marco RodriguezRodríguez]], [[David Selburg]], [[Louis Giambalvo]], Marc Alaimo, [[Lawrence Tierney]], Marc Alaimo, [[Daniel ZacapaMichael Durrell]], [[Morgan Woodward]], [[Michael DurrellGregory Sierra]], [[Gregory SierraGeorge D. Wallace]], [[Biff Yeager]], [[Clayton Rohner]], [[George Coe]], [[Robin GammellMark Metcalf]], [[Alfre WoodardRobert Costanzo]], [[Eric PierpointRobin Gammell]], [[Phil RubensteinAlfre Woodard]], [[James AveryGranville Van Dusen]], [[Robert CostanzoEric Pierpoint]], [[Hamilton Camp]], [[John HancockPhil Rubenstein]], [[Stanley KamelJohn Hancock]], [[Tim RussDavid L. Crowley]], [[Granville Van DusenStanley Kamel]], [[Stephen McHattieJ.D. Hall]], [[Gary FrankMike Gomez]], [[Jonathan BanksJames Avery]], [[Gail StricklandTim Russ]], [[Tracey WalterKaren Austin]], [[Robert SampsonJefrey Alan Chandler]], [[Mickey MortonBumper Robinson]], [[Anne HaneyStephen McHattie]], [[Milt TarverGary Frank]], [[Carlos LaCamaraJonathan Banks]], [[Kenneth TigarGail Strickland]], [[Tony PlanaTracey Walter]], [[Karole SelmonRobert Sampson]], [[J. Patrick McNamaraStephen Macht]], [[Ted GehringIan Patrick Williams]], [[Jimmie F. SkaggsMickey Morton]], [[Jefrey Alan ChandlerBrian McNamara]], [[Stephen MachtTed Gehring]], [[Martha HackettPatrick Cronin]], [[Brian McNamaraDarwyn Carson]], [[Lawrence PressmanJeannetta Arnette]], [[Margot RoseJack Murdock]], [[Clarence Williams IIIAnne Haney]], [[Dwight SchultzJimmie F. Skaggs]], [[David SpielbergMilt Tarver]], [[Jonathan FrakesCecile Callan]], [[George MurdockJ. Patrick McNamara]], [[James SaitoCarlos LaCamara]], [[Julianna McCarthyJohn Mahon]], [[Raye BirkMartha Hackett]], [[Robert DoQuiKenneth Tigar]], [[Peter BroccoTony Plana]], [[Victor BrandtKarole Selmon]], [[Sierra PecheurMichael Horton]], [[Janet MacLachlanLawrence Pressman]], [[Bruce FrenchMargot Rose]], [[Brent SpinerClarence Williams III]], [[Eric ServerRay Reinhardt]], [[Penny JohnsonDwight Schultz]], [[Sam AndersonChip Heller]], [[Davis RobertsPeter White]], [[Tina LiffordDavid Spielberg]], [[Richard McGonagleJorge Cervera Jr.]], [[Armin ShimermanJonathan Frakes]], [[Michael Ensign]], [[Robert O'ReillyGeorge Murdock]], [[Paul EidingWillson]], [[Faith MintonJoey Aresco]], [[John ChandlerPutch]], [[Evelyn GuerreroJames Saito]], [[Gregory ItzinJulianna McCarthy]], [[Merritt ButrickRaye Birk]], [[Phillip PineDavid Sage]], [[Charles CooperVinny Argiro]], [[Mario RoccuzzoRobert DoQui]], [[Carl ByrdPeter Brocco]], [[Vince HowardDavid Froman]], [[Georgia SchmidtVictor Brandt]], [[Louie EliasCharlie Brill]], [[Saul RubinekSierra Pecheur]], [[James CromwellJanet MacLachlan]], [[Shelly DesaiLorinne Vozoff]], [[Gene DynarskiTerrence Evans]], [[Matthew FaisonDavid A. Kimball]], [[John D. GowansBruce French]], Sid Haig, [[Larry HankinBrent Spiner]], [[Alex HenteloffKamala Lopez-Dawson]], [[John HostetterStephen Liska]], [[Ada MarisEric Server]], [[Joseph RuskinKeone Young]], [[Marcelo TubertPenny Johnson]], [[Gregory WagrowskiSam Anderson]], [[Ed BakeyMichael Champion]], [[Earl BoenStephen Lee]], [[Rick FittsFrank Collison]], [[Brian GeorgeWilliam Thomas Jr.]], [[Michael KeenanDavis Roberts]], [[Jack KehlerTina Lifford]], [[Nancy VawterRichard McGonagle]], [[Steve VinovichArmin Shimerman]], [[Jason WingreenMichael Ensign]], [[John FleckWilliam Frankfather]], [[Richard HerdRobert O'Reilly]], [[Judith JonesPaul Eiding]], [[Tom McCleisterFaith Minton]] und , [[Eric MenyukJohn Chandler]]) spielte er als eine der Hauptfiguren die Rolle des Lieutenant Howard Hunter, in ''Doogie Howser'' (1989-1993, u.a. mit Lawrence Pressman[[Evelyn Guerrero]], [[Rif HuttonGregory Itzin]], David Selburg, [[Paul LambertMerritt Butrick]], Jefrey Alan Chandler, [[Tim O'ConnorPhillip Pine]], [[Julie CobbDouglas Rowe]], [[Nana VisitorCharles Cooper]], [[Ron CanadaMario Roccuzzo]], [[Bruce GrayJohn Durbin]], [[Thelma LeeMiguel Ferrer]], [[Mark L. TaylorWayne Grace]], Paul Eiding, [[Leslie MorrisCarl Byrd]], Paul Kent, [[Jeff McCarthyVince Howard]], Granville Van Dusen, [[Roy BrocksmithGeorgia Schmidt]], [[Ursaline BryantKevin McDermott]], [[Larry CedarDan Woren]], [[Bob MinorMichael Canavan]], [[Christopher PettietNicholas Shaffer]], [[René AuberjonoisLaura Drake]], Anne Haney, [[Gwen Van DamJack Axelrod]], John D. Gowans, [[John Christian GraasGary Armagnac]], [[Deborah LaceyMatt Roe]], [[Stephen LeeNick Dimitri]], [[Andrew Hill NewmanLouie Elias]], [[Angela PatonSaul Rubinek]], [[Nehemiah PersoffJames Cromwell]], [[Joel PolisShelly Desai]], [[Freda Foh ShenGene Dynarski]], [[Marcelo TubertMatthew Faison]], [[Eve BrennerJohn D. Gowans]], Robert CostanzoSid Haig, [[Patrick CroninLarry Hankin]], [[Annie OAlex Henteloff]], [[John Hostetter]], [[Ada Maris]], [[Joseph Ruskin]], [[Marcelo Tubert]], [[Gregory Wagrowski]], [[Ed Bakey]], [[Earl Boen]], [[Rick Fitts]], [[Brian George]], [[Michael Keenan]], [[Jack Kehler]], [[Nancy Vawter]], [[Steve Vinovich]], [[Jason Wingreen]], [[John Fleck]], [[Richard Herd]], [[Judith Jones]], [[Tom McCleister]] und [[Eric Menyuk]]) spielte er als eine der Hauptfiguren die Rolle des Lieutenant Howard Hunter, in ''Doogie Howser'' (1989-1993, u.a. mit Lawrence Pressman, [[Lucy Boryer]], [[Rif Hutton]], David Selburg, [[Jeremy Roberts]], [[Paul Lambert]], Jefrey Alan Chandler, [[Tim O'Connor]], [[Richard Fancy]], [[Julie Cobb]], [[Nana Visitor]], [[Ron Canada]], [[Bruce Gray]], [[Thelma Lee]], [[Mark L. Taylor]], Paul Eiding, [[Leslie Morris]], [[Brigid Brannagh]], Paul Kent, [[Jeff McCarthy]], [[Craig Richard Nelson]], Granville Van Dusen, [[Conroy Gedeon]], [[Glenn Walker Harris Jr.]], [[Roy Brocksmith]], [[Jason Brooks]], [[Duke Moosekian]], [[Ursaline Bryant]], [[Larry Cedar]], [[Bob Minor]], [[Brady Bluhm]], [[Christopher Pettiet]], [[René Auberjonois]], Anne Haney, [[Gwen Van Dam]], [[Miriam Flynn]], John D. Gowans, [[John Christian Graas]], [[Deborah Lacey]], Stephen Lee, [[Athena Massey]], [[Andrew Hill Newman]], [[Angela Paton]], [[Nehemiah Persoff]], [[Joel Polis]], [[Freda Foh Shen]], [[Nancy Youngblut]], [[Marcelo Tubert]], [[Eve Brenner]], Robert Costanzo, [[Patrick Cronin]], [[Ryan MacDonald]], [[Annie O'Donnell]], [[Tricia O'Neil]], [[Jeff Yagher]] und [[Ed O'Ross]]) die des Doktor David Howser und in ''Brooklyn South''Donnell]](1997-1998, u.a. mit [[Tricia O'NeilTitus Welliver]], [[Jeff YagherJana Marie Hupp]] und , [[Ed O'RossDennis Creaghan]]) die des Doktor David Howser und in ''Brooklyn South'' (1997-1998, u[[John Cothran Jr.a. mit [[Titus Welliver]], [[Jana Marie HuppJoel Brooks]], [[Dennis CreaghanTheodore Bikel]], [[John Cothran Jr.Steven Flynn]], [[Joel Brooks]], [[Theodore Bikel]], [[Steven Flynn]], [[Joseph Joseph Ruskin]], [[John Prosky]], Richard McGonagle, [[Jack Shearer]], [[David Selburg]], Stephen Lee, Miriam Flynn, [[Mark Rolston]], [[Caitlin Brown]], [[Vinny Argiro]], [[Joseph Fuqua]], [[Jack Blessing]], [[Bill Bolender[Joseph Fuqua]], [[Jack Blessing]], [[Bill Bolender]], Brigid Brannagh, [[Jimmy Ortega]], [[David Paul Needles]], [[James Wellington]], [[Brigid Brannagh]], [[Jimmy OrtegaJosh Cruze]], [[Scott Jaeck]], [[Jennifer Hetrick]], [[Mike Genovese]], [[Don Stark]], [[L.L. Ginter]], Javier Grajeda, [[Miguel Perez]], Brian George, [[Viola Stimpson]], [[Georgann Johnson]], [[Louis Giambalvo]], [[Michael Bofshever]], [[Tony Plana]] und [[Leland Orser]]) die des Captain Stan Jones.

[[Kategorie:Darsteller (Film)|Sikking, James B.]]