Asking for help is not in Rob “Griff” Griffith’s nature. But the brusque doctor (Jason Isaacs, above)—who is still recovering from being shot, spending six months in a coma and waking to find his daughter, Sam (Sophia Bush), in his role as chief of cardiothoracic surgery at their Detroit hospital—has no choice in the March 23 episode of Good Sam.

With his body inexplicably in revolt, causing him to drop surgical instruments, he sees a therapist at Sam’s urging. Isaacs won’t spoil that casting (Bush’s former One Tree Hill costars Bethany Joy Lenz and Hilarie Burton also appear tonight as a patient accompanied by her sister), but he offers this preview.

What are Griff’s thoughts on therapy?

Jason Isaacs: It’s offensively ludicrous to him, but he does it with hopefully entertaining and dramatic results. There are corners of his soul that are unearthed to him, that he’s been blind to for a long time.

How has his opinion of Sam evolved since she’s become his boss?

He is physically, and suddenly professionally and intellectually, more vulnerable, and his daughter is a fearsome, impressive creature. She’s made from his mold, but different and better. There’s mixed feelings when your child is as good or better than you at something.

You’ve played everything from a doctor to a space captain (Star Trek: Discovery) and a dark wizard (Harry Potter). What profession would you still like to try onscreen?

I’m trained as a lawyer [in real life], and the one thing I haven’t done is [portray] a lawyer. I’ve missed my day in court!

Good Sam, Wednesdays, 10/9c, CBS