Lawman (1958)

Season 2: Episode 4

When Lily's estranged ex-con husband, Frank, comes to town she avoids telling Dan who the man is. Dan's suspicious of him- and with good cause. He's holding their son, Tommy, as a hostage to force Lily to help him rob the bank. She tries to handle the matter alone while keeping Dan from finding out anything, which only makes him more suspicious.