Janoušek himself returned to Czechoslovakia on 13 August 1945.
In six years of occupation the Nazis had jailed most of his family.
His wife Anna and one of his sisters had died in Auschwitz.
One of his brothers had died in Buchenwald.
Two of his brothers-in-law had also died in jail: one in Litoměřice in Bohemia and the other in Pankrác Prison in Prague.

General Vicherek had been sent to the Soviet Union on 1 May and made Commander of the Czechoslovak Air Force on 29 May. On 19 October 1945 Janoušek's post of Inspector of the Air Force ceased to exist.
The next day he accepted the post of Deputy Chief of the General Headquarters for Special Tasks.
He followed his late father into the Czechoslovak Social Democratic Party.
In January 1946 the Chief of the Staff of the Czechoslovak Armed Forces, General Bohumil Boček, appraised Janoušek as "lazy, insincere, and disgruntled".

Nevertheless, that spring Janoušek travelled to the UK to negotiate the purchase of UK and US materiél for the Czechoslovak Air Force.
On 8 June 1946 he took part in a victory parade in London, and on 11 June he attended a Royal Garden Party hosted by HM King George VI.
On 15 February 1947 Janoušek was appointed interim inspector of Air Defense by the General Staff.
On 15 September he was a member of the Czechoslovak delegation at the seventh anniversary of the Battle of Britain.

But at the same time the Czechoslovak Communist Obranné zpravodajství (OBZ) military and political intelligence organisation was monitoring Janoušek's social life and visits to foreign embassies.
On 15 October 1947 General Boček again appraised Janoušek, declaring "Janoušek is not suitable for a position in Command because of his attitude and therefore should only be employed in administration."

In February 1948 the Communist Party of Czechoslovakia seized power.
Three days later Boček ordered Janoušek, Brig Gen Alois Liška and military intelligence chief Gen František Moravec to take leave "for health reasons" pending a final decision about their future.
In March Gen Šimon Drgáč personally told Janoušek there was no place for him under the Communist régime.
Janoušek applied for a job at the International Civil Aviation Organization in Montreal, for which he had helped to lay the foundations at the 1944 Chicago conference.
Dr Josef Dubský at the ICAO offered him a job, but Bedřich Reicin at the OBZ refused to let Janoušek leave Czechoslovakia.
Janoušek himself returned to Czechoslovakia on 13 August 1945. In six years of occupation the Nazis had jailed most of his family. His wife Anna and one of his sisters had died in Auschwitz. One of his brothers had died in Buchenwald. Two of his brothers-in-law had also died in jail: one in Litoměřice in Bohemia and the other in Pankrác Prison in Prague.
General Vicherek had been sent to the Soviet Union on 1 May and made Commander of the Czechoslovak Air Force on 29 May. On 19 October 1945 Janoušek's post of Inspector of the Air Force ceased to exist. The next day he accepted the post of Deputy Chief of the General Headquarters for Special Tasks. He followed his late father into the Czechoslovak Social Democratic Party. In January 1946 the Chief of the Staff of the Czechoslovak Armed Forces, General Bohumil Boček, appraised Janoušek as "lazy, insincere, and disgruntled".
Nevertheless, that spring Janoušek travelled to the UK to negotiate the purchase of UK and US materiél for the Czechoslovak Air Force. On 8 June 1946 he took part in a victory parade in London, and on 11 June he attended a Royal Garden Party hosted by HM King George VI. On 15 February 1947 Janoušek was appointed interim inspector of Air Defense by the General Staff. On 15 September he was a member of the Czechoslovak delegation at the seventh anniversary of the Battle of Britain.
But at the same time the Czechoslovak Communist Obranné zpravodajství (OBZ) military and political intelligence organisation was monitoring Janoušek's social life and visits to foreign embassies. On 15 October 1947 General Boček again appraised Janoušek, declaring "Janoušek is not suitable for a position in Command because of his attitude and therefore should only be employed in administration."
In February 1948 the Communist Party of Czechoslovakia seized power. Three days later Boček ordered Janoušek, Brig Gen Alois Liška and military intelligence chief Gen František Moravec to take leave "for health reasons" pending a final decision about their future. In March Gen Šimon Drgáč personally told Janoušek there was no place for him under the Communist régime. Janoušek applied for a job at the International Civil Aviation Organization in Montreal, for which he had helped to lay the foundations at the 1944 Chicago conference. Dr Josef Dubský at the ICAO offered him a job, but Bedřich Reicin at the OBZ refused to let Janoušek leave Czechoslovakia.
Karel Janoušek