Alec Baldwin plays Dr. Jack Ryan in The Hunt for Red October, the CIA analyst who comes to believe that Ramius may be trying to defect rather than attack. Producer Mace Neufeld went to Kevin Costner first, and Harrison Ford also declined, so Baldwin became the first actor to play Ryan on screen. He turned 31 on April 3, 1989, the day principal photography began.
Sean Connery plays Capt. 1st Marko Ramius, commander of the new Soviet submarine Red October. He took over from Klaus Maria Brandauer after filming had already run for about two weeks. Mental Floss reports that Connery needed only one day of rehearsal and later said the gimbal mounted sets made him seasick.
Scott Glenn as CDR Bart Mancuso (USS Dallas)
Scott Glenn plays CDR Bart Mancuso, captain of the USS Dallas, the American submarine that loses track of Red October. Glenn, a former Marine, prepared aboard the fast attack submarine USS Salt Lake City during war games and studied its commanding officer, Tom Fargo. Fargo had the crew treat the actor as his equal in rank while he watched.
Sam Neill as Capt. 2nd Vasily Borodin
Sam Neill plays Capt. 2nd Vasily Borodin, one of the senior officers serving under Ramius aboard Red October. Neill is billed fourth, and his scenes take place aboard the Soviet boat. The production built most of its submarine interiors on Paramount soundstages and mounted them on hydraulic gimbal platforms so the sets could move like a boat at sea.
James Earl Jones plays Vice ADM James Greer, the senior CIA figure Jack Ryan reports to, in The Hunt for Red October. The AFI Catalog records director John McTiernan saying that Jones brought the character stern yet warm qualities. Jones is the only lead who stayed with his part as the series moved on, and he played Greer again in Patriot Games (1992) and Clear and Present Danger (1994).
Joss Ackland as Ambassador Andrei Lysenko
Joss Ackland plays Ambassador Andrei Lysenko, the Soviet envoy in Washington, in The Hunt for Red October. In the setup, both the American military and the Soviet ambassador suspect that Ramius is planning an attack, so Lysenko sits at the center of the film's diplomatic story. Ackland is billed sixth in the TMDB credits and is listed in the AFI Catalog's principal cast.
Richard Jordan as Dr. Jeffrey Pelt, National Security Advisor
Richard Jordan plays Dr. Jeffrey Pelt, National Security Advisor, in The Hunt for Red October, the White House official who has to weigh Ryan's defection theory against the fear of an attack. Jordan is billed seventh in the TMDB credits and belongs to the Washington side of the ensemble rather than the submarine crews. The AFI Catalog lists him as Jeffrey Pelt among the principal players.
Peter Firth as Capt. 2nd Ivan Putin (Political Officer, Red October)
Peter Firth plays Capt. 2nd Ivan Putin in The Hunt for Red October, credited as the political officer aboard Red October. Firth is billed eighth in the TMDB credits, directly after Richard Jordan, and the AFI Catalog lists him as Ivan Putin in its principal cast.
Tim Curry as Dr. Yevgeni Petrov (Red October)
Tim Curry plays Dr. Yevgeni Petrov, the doctor aboard Red October, and is billed ninth. Curry belongs to the Soviet crew, and during production John Milius rewrote some of the script, including Connery's speeches and all of the Russian dialogue. The AFI Catalog lists Curry as Dr. Petrov in the principal cast.
Courtney B. Vance as Petty Officer Ronald 'Jonesy' Jones (USS Dallas)
Courtney B. Vance plays Petty Officer Ronald 'Jonesy' Jones, the sonar operator aboard the USS Dallas, in The Hunt for Red October. The AFI Catalog notes that casting Vance departed from Tom Clancy's novel, where the character is not written as Black, and that the same was true of James Earl Jones as Greer. Vance is billed tenth, the highest placed Dallas crew member after Scott Glenn.
Stellan Skarsgård as Capt. 2nd Viktor Tupolev (V.K. Konovalov)
Stellan Skarsgård plays Capt. 2nd Viktor Tupolev in The Hunt for Red October, credited aboard the Soviet submarine V.K. Konovalov rather than with the Red October crew. He is billed eleventh in the TMDB credits and heads the Konovalov names there. That group also includes Krzysztof Janczar as Andrei Bonovia, with Vlado Benden and George Saunders as seamen.
Jeffrey Jones as Skip Tyler
Jeffrey Jones plays Skip Tyler in The Hunt for Red October, one of the few principal characters credited without a rank, a ship or an office. He is billed twelfth in the TMDB credits, just ahead of Fred Thompson as Rear ADM Joshua Painter. The AFI Catalog lists Jones as Skip Tyler alongside the film's Washington and Navy players.