Danger Lights

"Danger Lights" is a 1930 American drama film about Dan Thorn, a divisional boss on the Milwaukee Railroad, who takes in a former railroad engineer, Larry Doyle, after his insubordination gets him fired. Thorn's relationship with Doyle becomes complicated as Doyle develops feelings for Thorn's fiancée, Mary Ryan, but ultimately helps Thorn recover from a near-fatal train accident that leaves him seriously injured. Louis Wolheim stars as Dan Thorn, while Robert Armstrong and Jean Arthur play key supporting roles as Larry Doyle and Mary Ryan, respectively.