HBO wants people to talk about mental illness.

The network announced on Thursday a campaign to use its shows to increase awareness around mental health issues, highlighting characters’ struggles with conditions like depression, obsessive-compulsive disorder or substance abuse.

As part of the initiative, called “It’s OK,” some episodes of shows will begin with an alert identifying the mental health challenges faced in the program — “The following program contains depression,” for example. These notices will come as part of new series and will be added retroactively to existing shows, including “The Sopranos,” “Barry” and “Euphoria.” The alerts will end by encouraging anyone who needs help to contact the National Alliance on Mental Illness.

The network stressed that these are invitations, not warnings, to audiences.

“We are not saying ‘viewer discretion is advised,’” Jason Mulderig , HBO’s Vice President of Brand and Product Marketing, said in a statement. “We are saying ‘viewer conversation is encouraged.’”