Superman: The 1948 & 1950 Theatrical Serials Collection

Superman helps save a bridge and then finds Luthor's hideout.

Jimmy meets the masked Atom Man.

Perry assigns Lois and Clark to interview Luthor who has been granted parole.

Superman returns to save Lois and Jimmy.

Luthor has an aide get captured by Superman.

Luthor needs radium to finish developing synthetic kryptonite.

Luthor arranges for a piece of kryptonite to be planted in the Daily Planet office at night.

Atom Man sends Superman into space.

Clark plots with Perry to prove Luthor is Atom Man.

Luthor uses Lois as a diversion but this time stopping the crooks to boost his reputation.

Clark is still suspicious of Luthor.

Lois is suspicious when three stores are robbed where she has done interviews.

Superman traces the remains of the beam back to Luthor's hideout.

Luthor uses a sonic beam to cause earthquakes in Metropolis.

Luthor's identity as Atom Man has been publicly exposed.