The film is set in Northern Ireland shortly after 1994 cease-fire. Hazel is a Protestant and Malachy a Catholic. Romance between them is threatened by Rohan (leader in militant underground and pal of Malachy's brother Padhar), who wants Malachy to be recruited and fight for the cause and by Hazel's brother Jef, who spies on her meetings.
Unfortunately the movie This Is the Sea is not yet available on HBO Max.
| Directing | Mary McGuckian | Director |
| Writing | Mary McGuckian | Screenplay |
| Art | David Butterworth | Art Direction |
| Costume & Make-Up | Carole Dunne | Hairstylist |
| Production | Elvira Bolz | Producer |
| Production | Mary McGuckian | Producer |
| Editing | Kant Pan | Editor |
| Production | Peter Samuelson | Executive Producer |
| Production | Brian Gilbert | Executive Producer |
| Camera | Des Whelan | Director of Photography |
| Production | Ros Hubbard | Casting |
| Costume & Make-Up | John Rocha | Costume Design |
| Editing | Alan Duffy | Editor |
| Costume & Make-Up | Linda Mooney | Makeup Supervisor |
| Production | Ron Stoneman | Executive Producer |
| Art | Claire Kenny | Production Design |
| Production | Michael Garland | Producer |
| Production | Cameron McCracken | Executive Producer |
| Production | John Hubbard | Casting |
| Costume & Make-Up | Linda Mooney | Hair Supervisor |
| Production | Paul Frift | Line Producer |
| Sound | Brian Kennedy | Original Music Composer |
| Costume & Make-Up | Odette Rocha | Costume Design |
| Production | Judy Counihan | Co-Producer |
| Production | Marc Samuelson | Executive Producer |
| Sound | Mike Scott | Original Music Composer |
