ABC | 8:00 pm
The preceding episode left viewers with a big surprise: the appearance of "Glee" alum Matthew Morrison as Jo’s (Camilla Luddington) abusive and estranged husband. He returns as the medical drama resumes with the new story "1-800-799-7233," which also marks the start of a guest arc by Bethany Joy Lenz ("One Tree Hill"). The FBI continues to seek the hacker who targeted the hospital. Ellen Pompeo and Justin Chambers also star.