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 |
| Production | Michael Garland | Producer |
| Production | Mary McGuckian | Producer |
| Costume & Make-Up | John Rocha | Costume Design |
| Writing | Mary McGuckian | Screenplay |
| Sound | Brian Kennedy | Original Music Composer |
| Camera | Des Whelan | Director of Photography |
| Editing | Alan Duffy | Editor |
| Art | David Butterworth | Art Direction |
| Production | Brian Gilbert | Executive Producer |
| Production | Cameron McCracken | Executive Producer |
| Production | John Hubbard | Casting |
| Production | Ros Hubbard | Casting |
| Production | Elvira Bolz | Producer |
| Production | Peter Samuelson | Executive Producer |
| Costume & Make-Up | Carole Dunne | Hairstylist |
| Sound | Mike Scott | Original Music Composer |
| Costume & Make-Up | Odette Rocha | Costume Design |
| Editing | Kant Pan | Editor |
| Costume & Make-Up | Linda Mooney | Makeup Supervisor |
| Production | Paul Frift | Line Producer |
| Production | Ron Stoneman | Executive Producer |
| Costume & Make-Up | Linda Mooney | Hair Supervisor |
| Art | Claire Kenny | Production Design |
| Production | Judy Counihan | Co-Producer |
| Production | Marc Samuelson | Executive Producer |
